US President Donald Trump on Sunday said his “civilisation will die” remarks brought Iran to the bargaining table for the now failed peace talks, and predicted that they will come back.

The US president said his threat to impose 50% tariffs on goods from countries that sold weapons to Iran was aimed at China.

A Chinese delegation is expected to arrive in Islamabad to support Pakistan’s mediation efforts in ongoing talks between the United States and Iran, according to a Pakistani foreign ministry source.

The Iran-US peace talks were conducted first indirectly through Pakistan and later through direct negotiations between the two sides, official sources said on Sunday.

The Iran-US talks in Pakistan have ended without a deal due to "excessive demands" made by the American side, a top Iranian official said on Sunday.

US Vice President JD Vance said on Sunday that the Islamabad Talks with Iran failed as the two sides could not bridge the gulf of differences despite hectic efforts spreading more than 21 hours.

The first round of direct talks between the United States and Iran, held in Islamabad, has concluded, Al Jazeera reported citing sources close to the development.

A US delegation led by Vice President JD Vance held historic face-to-face talks with top Iranian negotiators in Pakistan on Saturday to reach a peace agreement to end the war in West Asia that has paralysed global energy markets and disrupted trade.