Iran's top leader expressed doubts that nuclear talks with the United States would lead to a new deal, saying it made "excessive and outrageous" demands on uranium enrichment.

"We don't think this will lead to any results. We don't know what will happen," said Ayatollah Ali Khamenei.

U.S. President Donald Trump said last week that Iran has "somewhat" agreed to the terms of a deal after Aman introduced four rounds of negotiations since April 12.

But ahead of another round of the race this weekend, Iran's chief negotiator rejected the assertion of his U.S. counterpart that it must promise to stop producing enriched uranium, which can be used to make reactor fuel and nuclear weapons.

Trump, who pulled the United States from a nuclear deal between Iran and the world's major powers during his first term during his tenure, warned Iran that it could face military actions from us and Israel if the negotiations were not successful.

Iran insists that its nuclear activities are totally peaceful and that it will never seek to develop or acquire nuclear weapons.

However, it violated the restrictions imposed by the existing nuclear agreement on retaliation against resumption of U.S. sanctions seven years ago and stored enough high-gain uranium to make several bombs.

Khamenei talked about the latest developments in negotiations with the United States during a ceremony to commemorate the late President Ebrahim Raisi, who died a year ago in a helicopter crash.

He praised the hardline priest Raisi, who refused to negotiate directly with the United States.

Khamanei noted: “He clearly said 'no' without ambiguity.

Khamenei said nuclear negotiations under Resi's predecessor, moderate pastor Hassan Rouhani, failed to achieve results, and he did not think his successor, Masoud Pezeshkian, was a reformist.

The top leader also criticized the Trump administration's approach, saying: "The U.S. side in these indirect negotiations should avoid ridiculous remarks."

"It's a big mistake to say they don't allow Iran to be rich. No one is waiting for their permission."

"We can't even allow 1% of the abundance capacity. We have made a recommendation to the Iranians that we think we think some aspects of it without disrespecting them," Steve Witkoff, the U.S. Special Envoy, told ABC News in an interview on Sunday.

"We want to find a solution here. We think that will be able to do it," he added.

“But everything starts from our perspective, not including richness. We cannot have it.

Iranian Foreign Minister Abbas Araqchi quickly warned Witkoff: "Unrealistic expectations of stopping negotiations, and fulfillment in Iran cannot stop."

"I think he's completely distanced from the reality of the negotiation," he added.

Iran's 2015 deal with then-U.S. President Barack Obama and the UK, France, China, Russia and Germany saw it restrict its nuclear activities and allow the International Atomic Energy Agency (IAEA) to conduct inspections to restore sanctions relief.

Only allow Iran to enrich up to 3.67% of purity, which can be used to produce fuel for commercial nuclear power plants.

In February, the International Atomic Energy Agency warned that Iran had enriched nearly 275 kilograms (606 pounds) of uranium to 60% purity, i.e. weapons grades approached. In theory, for six nuclear bombs, this is enough to enrich to 90%.