"An American government that chooses to trample on her legal and legitimate worldwide commitments, a conversation with such a government would be a waste of time". He did not elaborate on the comment but reiterated his country's claim to be seeking peaceful nuclear energy.
"Iran does not seek to restore its ancient empire, impose its official religion on others or export its revolution through the force of arms", he said.
Mr Rouhani also defended the 2015 nuclear deal made between Western states and his country, warning that if the United States abandoned the agreement they would lose the worldwide community's trust. That could mean a return of US sanctions on Iran that were suspended under the agreement.
"I'll let you know what the decision is", Trump said with a smile. Instead he referred to him obliquely, at one point saying it would be a pity if the nuclear deal were undone by "rogue newcomers to the world of politics".
Future of the deal?
Netanyahu was the first leader to have a one-on-one with Trump at the U.S. president's first United Nations General Assembly, an annual week of high-level diplomacy. "What it is, is a clear signal that he's not happy with the deal".
"It is particularly worrying that the United States, through its President Trump, has once again confirmed its unbending stance and fiercely criticized the joint action plan, which allowed eliminating the Iranian nuclear issue", he said.
Should Trump either not certify Iranian compliance or withdraw from the deal entirely, the Gulf official said: "I think we can live with that".
He had seen "great potential right across the street" from United Nations headquarters, Trump said, referencing his decision to build the 72-floor residential skyscraper Trump World Tower nearby.
Ryanair to cancel up to 50 flights a day
It claims less than two per cent of flights will be cancelled, but passengers have expressed their fury over late cancellations. Ryanair is advising customers affected to check the email they booked their flights with to see if their services are running.
If Trump really wanted to end the deal, he could stop waiving USA sanctions on Iran for its nuclear program on his own, which would be a "material" breach of the agreement that would effectively destroy it and allow Iran to walk away.
That is the last day senators will be in Washington before President Trump's October 15 deadline to certify whether Tehran is compliant.
The Democrats' letter on Wednesday noted that the 2015 review act required the president to provide information to Congress on any Iranian breach of the agreement or compliance concern within 10 days of receiving the information. If US lawmakers reimpose economic sanctions the agreement would likely collapse.
He actually thanked the United Nations for its work in levelling economic sanctions on North Korea, and saluted the role played by China and Russian Federation.
Lavrov's comments, made to Russian reporters at the United Nations in NY and published by his ministry on Wednesday, illustrate how deeply Moscow and Washington are at odds over an array of issues and suggest any attempts to improve already battered relations face an uphill struggle. The deal belongs to the worldwide community.
With Europeans not on the same page as the Trump administration, Iranian officials say they have an opportunity to divide the P5+1 group that negotiated the deal with Iran. Kicking the debate to Congress, some have argued, would also give the administration leverage with Iran -- a shot across the bow that sanctions could be imminent if they do not renegotiate the terms.
In an interview with Deutsche Welle, German Chancellor Angela Merkel said the agreement was "better than having no agreement at all."
That's not so clear, according to French President Emmanuel Macron, who met with President Trump earlier this week.
European Union foreign policy chief Federica Mogherini is chairing the closed-door meeting to discuss the 2015 deal that President Donald Trump has threatened to scrap unless it is re-opened for negotiations.