The US-Iran deal, serving as foundation for the ongoing talks in Switzerland, marks a crucial diplomatic achievement for Pakistan, perhaps the most significant in the country's modern history.

"Pakistan was not only able to effectively leverage its relations with Tehran and growing closeness to Washington but also its network of regional partners like Qatar, Saudi Arabia, and Turkey," Farwa Aamer, director of South Asia Initiatives at the Asia Society Policy Institute in New York, told DW.

"It gave Pakistan more diplomatic weight and international support going into the mediation role," she added.

Islamabad also boasts close ties with China — not an easy feat on a continent increasingly shaped by the Washington-Beijing rivalry.

"Pakistan's patient diplomacy was critical in getting the US-Iran deal across the finish line, though its long-term impact will depend on the agreement's durability as difficult negotiations continue," Elizabeth Threlkeld, South Asia director at the Washington-based Stimson Center, told DW.