Iranian President Hassan Rouhani, speaking at the same United Nations podium from which the United States yesterday denounced the accord curbing Iran's nuclear programme as one of the 'worst deals ever, ' on Thursday pledged his country's continued adherence to the pact.
Under the agreement between Iran and six world powers-the USA, the UK, France, China, Germany and Russia-Tehran agreed to curb its nuclear program in exchange for the lifting of economic sanctions.
Rouhani made his remarks a day after Trump's debut UN General Assembly speech in which he threatened to "totally destroy" North Korea if it continued to pose a threat to the United States and criticised the described the nuclear deal with Iran.
Trump made major mistakes in his speech and leveled "baseless allegations that are beneath the dignity of the United Nations and the person who deems himself the president of a country", Rouhani added. "I'll let you know".
The 2-year-old nuclear agreement, negotiated by the United States, the European Union and other partners, led to the lifting of most worldwide sanctions against Iran in return for curbs on its nuclear program.
He said that Iran had failed to live up to the expectations of the deal, which expected a more peaceful, stable relationship with the country.
USA officials have sent mixed signals about the nuclear agreement hammered out two years ago by Trump's predeccessor Barak Obama.
In her speech to the United Nations shortly before their meeting, May rebuked Trump over his demand to rewrite the the historic Paris Agreement on tackling climate change.
"The nuclear deal belongs to the worldwide community, not one party", Rohani said in a speech to the UN General Assembly on Wednesday.
Under the deal, Iran undertook to apply certain limits to its nuclear program in exchange for the termination of all nuclear-related sanctions against Tehran.
Washington's anger is also rooted in its failure to advance its agenda in the West Asia region, where Iran has played an influential, dignified and successful role, he said.