Managing the Spillover: Pakistan, U.S.-Iran Mediation, and the Security Logic of Diplomacy

Uma Miskinyar

The Core Thesis 

If there is one prime takeaway that we must acknowledge amidst the ongoing Iran-U.S. conflict, it is this: Pakistan's mediation is driven in part by the costs Islamabad would bear from Iranian destabilization. Moving away from being viewed as a "security state" or "troubled partner," Islamabad is leveraging its unique geography and channels with both Washington and Tehran to make itself indispensable, using diplomacy as a tool to manage both its image and its internal security threats. Aside from positioning itself as the diplomatic mediator, Pakistan’s diplomacy amid this conflict is driven by a desire to prevent a security vacuum along its 565-mile border with Iran, rather than by a bid solely for diplomatic prestige, thus bolstering the state’s counterterrorism strategy.

Mediation as Border Security Strategy

Pakistan’s Durand Line, shared with Afghanistan, is experiencing great levels of armed conflict. Islamabad’s strategy in mediating the U.S. and Iran talks allows it to not only gain and maintain status as a powerful diplomatic force, but also strategize to secure its western border, shared with Iran, to prevent further armed conflict spillover into its state.

In March 2026, the Global Terrorism Index ranked Pakistan as the country most impacted by terrorism for the first time, recording 1,139 terrorism deaths and 1,045 incidents in 2025, its highest level since 2013. This statistic, put into context with the current Iran-U.S. conflict heightens Islamabad's concern that a weakened Iranian state would create operational space for Baloch separatists, sectarian militants, smugglers, and a greater number of transnational jihadist actors in the country’s southwest. Islamabad is confronting several armed networks operating across peripheral regions where stretched enforcement capacity facilitates greater angst over the crevices in where militant capacity can emerge. 

The threat is further amplified by the Tehrik-e-Taliban Pakistan (TTP) based around the Durand Line, Ittehad-ul-Mujahideen Pakistan (IMP), and ISIS, both the Khorasan and Pakistan province dispersed along the Durand Line. The TTP and Balochistan Liberation Army (BLA), based in Balochistan, are at the frontline of performing terrorist attacks within Pakistan. Conflict from both groups is primarily concentrated along the Durand Line and Khyber Pakhtunkhwa, which has risen as an epicenter for guerrilla warfare driven by both politically and ideologically driven motivation in recent years. In response, Pakistan is dividing its security focus between separatist violence, tensions along the Durand Line, and broader regional instability as enforcement capacity across peripheral regions such as Balochistan becomes uneven. 

The parallel roles of Oman, Qatar, and Pakistan further show an emerging regional division of diplomatic labor rather than a competition over who receives credit for mediation. Pakistan and Qatar remain attached to the broader political framework created through the Islamabad Memorandum of Understanding, while Oman has increasingly concentrated on the maritime dimension of the conflict within negotiations surrounding commercial passage through the Strait of Hormuz. Each intermediary brings a different form of leverage: Muscat is geographically and diplomatically positioned to address the Gulf-facing maritime dispute, Islamabad’s comparative value lies in its unusual political access and its direct exposure to the consequences of Iranian instability, which then characterizes Pakistan’s vulnerability to the conflict as reason behind its role.

The Western Rim

Iran is often viewed in Pakistan through ideological, sectarian, and geopolitical suspicion. But Pakistan sees value, despite the state being aware of Iran’s suspicion of its state, in Tehran’s state machinery as a stabilizer, which is why the added benefit in using the Islamabad talks includes securing Pakistan’s western border. More specifically, Tehran’s state machinery, including its security service, border forces, and administrative structures, may be opportune in constraining border smuggling, militant transit, and greater-scope terrorism spillover. If there was an alternative to Tehran’s imperfect but still functioning state control, there would be a risk in enabling an environment for militants, traffickers, and non-state actors within the region. Islamabad, respectfully, may not be in such a position to take that risk.

Tying this to strategy, Tehran is betting that it can outlast the U.S. by turning the Middle East’s trade routes, shipping lanes, and energy infrastructure into pressure points as a means to raise the cost of confrontation, according to Gulf officials and analysts. Thus, Pakistan’s objective in mediation grows greater than using the talks as a soft-power counterterrorism strategy, but also as motive and preventative action in avoiding an internal security dilemma that may stem from Iran’s instability rather than solely an outward preventative force. 

Pakistan’s effort to preserve stability in Iran is becoming more complicated, however, by Islamabad’s simultaneous integration into an expanding regional security architecture. On August 7, Pakistan, Saudi Arabia, and Türkiye signed the Mecca Joint Defence Agreement, establishing that an armed attack against one of the three would be regarded as an attack against all. The agreement does not specify automatic military commitments, and its signatories insist that it is defensive rather than directed against Iran. Tehran itself has publicly stated that it sees no reason to interpret the arrangement as a threat, yet the tension remains significant. Pakistan is now attempting to preserve Iranian confidence in its role as mediator while deepening security commitments with states directly exposed to the consequences of Iranian and Iran-aligned regional escalation. This strategy is loaded in complexity as Islamabad is attempting to occupy two positions simultaneously: interlocutor with Tehran and security partner to Gulf states seeking greater collective deterrence. 

Mediation as Economic Value

There is always a silver lining. NGOs such as the International Crisis Group argue that Islamabad’s indispensability in being a mediating force during the Tehran-Washington talks mirrors the same economic model used by other states to create leverage. Examples of this include Oman facilitating the Iran-U.S. contacts, Türkiye mediating the Russia-Ukraine grain negotiations, and even Qatar hosting negotiations. Why is this? 

Separate from employing its soft power in receiving status as an emblem of diplomacy and counterterrorism buffer for both internal clashes and external spillover, diplomacy has economic value. For Pakistan, successful mediation may strengthen investor confidence, reduce the risk of regional trade and energy disruptions, encourage greater engagement with Gulf partners, and improve the broader political environment surrounding external financing.

In addition, Pakistan’s network of relationships is unusually unique, and to the United States, makes Washington’s relationship to Pakistan crucial, viable, and strategic to maintain. Think of it like this: Pakistan has to simultaneously manage relations with Washington, Beijing, Tehran, Riyadh, Ankara, and Kabul. Very few countries have meaningful relationships with all of these actors. Islamabad does not have perfect relationships with each of the states named; they are at times uneven, arguably tense, but consequential nonetheless. There is still value to this; such a position allows Pakistan to carry messages across political divides that do not ordinarily communicate easily. 

Pakistan is testing whether strategic indispensability can be monetized. In July, Pakistan sought a $10 billion exchange-stabilization facility from Washington after its mediation elevated Islamabad’s diplomatic standing with the United States. This does not establish a quid pro quo between mediation and financial assistance, nor does external financing substitute for domestic economic reform, but instead reflects Islamabad’s attempts to translate diplomatic usefulness into material leverage. 

A feedback loop is created: Pakistan’s relationships make it valuable as an intermediary, its value as an intermediary gives other states an incentive to preserve access to Pakistan, and that external interest further motivates Islamabad to maintain its diplomatic network. This thereby makes mediation self-reinforcing as it can generate influence, attract economic engagement, and help Pakistan manage the security risks created by instability beyond its borders. Thus, geographic vulnerability is simultaneously diplomatic capital. 

Synthesis & Future Outlook

With Washington seeking unimpeded commercial passage through the strait while attempting to constrain Iran’s nuclear capabilities and broader regional coercive capacity, the present Iran-U.S. conflict can no longer be reduced to a negotiation over nuclear enrichment or even the Strait of Hormuz alone. Tehran has tied a full reopening of Hormuz to a wider collection of demands, ranging from sanctions relief, the release of frozen assets, an end to the U.S. naval blockade and further military threats, to the compensation for wartime damage. Iran’s strategy has expanded beyond the negotiating table as it leverages its pressure on shipping lanes, energy infrastructure, and regional states as influence intended to raise the cost of continued confrontation. 

For states situated beside a war, crisis is rarely an opportunity. What we do know, however, is that Pakistan’s strategic usefulness can be a form of currency. Managing competition creates leverage, and leveraging diplomatic reach over solely remaining neutral shifts the state into the category of a proactive risk manager rather than a reactive body with no mechanisms to ameliorate tension.  

The experience of the post-9/11 era demonstrated that while military pressure can degrade organizations and eliminate leadership, the networks and conditions that sustain ideological movements rarely disappear entirely. Instead, they adapt, awarding the quiet patience that defines the success of their agenda. That lesson matters to the present conflict not because mediating between Washington and Tehran is itself an act of counterterrorism, but because preventing an additional permissive security environment along Pakistan’s Iranian frontier protects the state capacity required to confront threats already concentrated elsewhere.

In regards to conflict along the Durand Line and militant activity within Pakistan, terrorism has not gone away, nor will it cease anytime soon. Effective capacity building therefore requires a calculated balance between hard and soft power. Diplomacy does not replace Pakistan’s counterterrorism apparatus; it can protect the regional conditions under which that apparatus remains focused. In this sense, Pakistan’s mediation strategy reveals the broader security logic of diplomacy: preventing a neighboring crisis from becoming another domestic battlefield.