Is this Trump's last 'last chance'? Ceaseless string of broken ceasefires fuels doubt over Iran deal

President Donald Trump is warning Iran that it has one last chance to make a deal, even as Tehran denies the negotiations Trump says persuaded him to hold off on a major U.S. attack.

The clash has left the status of the diplomatic effort unclear. Trump says indirect talks could reopen the Strait of Hormuz and eventually address Iran's nuclear program, while Tehran acknowledges only limited discussions with Oman and has not publicly embraced the broader deal Trump has described.

Iranian Foreign Ministry spokesman Esmail Baghaei said, however, that Tehran was neither holding talks with the United States nor expecting an American delegation. He described the Oman discussions as a bilateral effort to establish a temporary shipping corridor through the Strait.

Trump, in response, accused Iran's leadership of being "unbelievably duplicitous."

"They ask for a meeting, some would say 'beg,' talks begin, with more scheduled in the immediate future, and they say, openly and proudly, that they're not having any discussions," Trump wrote Monday on Truth Social.

Later that afternoon, Trump called the talks Iran's "last chance" to avoid an escalation in U.S. strikes. He said negotiators would first seek to reopen the Strait, then turn to Tehran's nuclear program.

"The first phase is the opening of the straits. The second phase will be the denuclearization," Trump said in the Oval Office. "And that will take a little while."

Trump said reporters could learn more about the negotiations "today or tomorrow." Iran has not publicly endorsed either phase of his plan.