• Negotiations between the US and Iran ended without a deal after 21 hours of discussions.
• Vice President JD Vance emphasized the need for Iran to commit to not developing nuclear weapons.
• Communication with President Trump was frequent during the negotiations, with up to a dozen calls.
• Iran accused the US of being unreasonable in their demands.
• Pakistan's Foreign Minister announced intentions to facilitate future dialogue.

US Vice President JD Vance announced that negotiations with Iran concluded on Sunday without reaching an agreement after 21 hours of talks in Islamabad, Pakistan. The core issue was Iran's refusal to commit to not developing nuclear weapons, which Vance stated is the "core goal" of the US administration. He expressed hope that Iran might consider the "final and best offer" presented by the US before leaving Islamabad, reiterating the need for an affirmative commitment from Iran regarding nuclear pursuits, according to Channel News Asia and Le Monde.

Vance detailed that he had been in "constant communication" with President Donald Trump during the negotiations, stating they spoke "a dozen times" about the situation. This underscores the urgency and significance the US placed on these discussions, as they aimed to get a workable commitment from Iran against nuclear development. He described the negotiations as having been conducted in "good faith," despite the deadlock reached, as Iran’s parliament speaker called the US demands "unreasonable," pointing to a fundamental trust issue, according to India Times and Channel News Asia.

Both sides emphasized the implications of these negotiations, particularly concerning nuclear capabilities and regional peace. Vance remarked that for the negotiations to see progress, a "fundamental commitment" from Iran was necessary. Meanwhile, Iranian officials expressed skepticism about the US's reliability, stating that constructive proposals were ignored, aggravating tensions in the longstanding disputes over nuclear weapons and military engagement, according to Le Monde and India Times.