Speaking after the talks, Vance said Washington had clearly presented its “red lines,” particularly demands for guarantees that Iran would not pursue nuclear weapons. However, he noted that Tehran رفض these terms, insisting instead on sanctions relief, recognition of its rights, and access to frozen financial assets as preconditions for progress.

The high-stakes negotiations, mediated by Pakistan, stretched nearly 21 hours and were described as “substantive” but ultimately inconclusive. Multiple proposals were exchanged during the closed-door discussions, but both sides failed to bridge the gap on key issues.

Vance abruptly departed Islamabad on Sunday following the breakdown, without clarifying what the failed talks would mean for the fragile ceasefire currently in place.

Despite the outcome, he praised Pakistan’s leadership, including Prime Minister Shehbaz Sharif and Army Chief Asim Munir, for their role in facilitating the dialogue.

The impasse underscores the widening divide between Washington and Tehran, even as both sides engaged in detailed discussions covering nuclear ambitions, sanctions, and broader regional tensions. The failure to secure a deal after prolonged negotiations has raised fresh concerns about the future of diplomacy and the risk of renewed escalation.