Pakistan finds itself in a precarious diplomatic position after Prime Minister Shehbaz Sharif hosted high-level US-Iran negotiations in Islamabad on April 11 — the most significant direct talks between Washington and Tehran since the 1979 Iranian Revolution — while simultaneously deploying Pakistan Air Force aircraft to Saudi Arabia's King Abdulaziz Air Base under a Strategic Mutual Defence Agreement (SMDA) signed with Riyadh in September 2025. The SMDA commits both countries to treating an act of aggression against one as an act against the other, a particularly sensitive obligation given Iran's prior strikes on Saudi territory before a ceasefire took effect. With that ceasefire set to expire on April 22 and a US naval blockade of Iranian ports now in place, analysts warn that Pakistan's dual role as mediator and Saudi defence partner could become untenable if hostilities resume.