"The nuclear agreement is a multilateral and global contract achieved after years of dialogue and negotiation", said Mohammad Javad Zarif, the Foreign Minister of the Islamic Republic of Iran, late on Thursday. The historic agreement shut down most of Iran's nuclear program, in some cases for decades, in exchange for an easing of global sanctions.
The official, who spoke on condition of anonymity, said Trump could always change his mind.
The US State Department spokesperson Heather Nauert said the US administration has not completed the review of the JCPOA.
U.S. President Donald Trump is "very likely" to recertify Iranian compliance with the Iran nuclear agreement although he continues to have reservations about it, a senior U.S. official said on Thursday. "We'll ensure that Iran is held strictly accountable to its requirements".
Elaborating his view on US-Russian brokered ceasefire for southwest Syria, he noted that Iran supports comprehensive truce in the war-torn region.
Trump wants to renegotiate 'horrible' trade deal with South Korea
Trump kicked off the discussion by saying his administration wants a deal "that's fair for the USA and fair for South Korea". Mr Lighthizer called for the meeting to be held in Washington next month, at a date to be agreed upon later by both sides.
The deal was negotiated during the presidency of Barack Obama. Trump and some top members of his administration remain critical of the deal, but so far, the president has not announced a decision to pull out.
In July 2015, Iran and six world powers, Britain, China, France, Germany, Russia and the United States, reached an agreement on the Iranian nuclear issue, which put it on the path of sanctions relief but with more strict limits on its nuclear program.
The top European Union official stressed the importance of the regular meetings of the Joint Commission in order to "ensure transparency, constant dialogue and implementation by all" and noted that the next meeting of the commission is scheduled to be held in the Austrian capital Vienna on July 21. In return, Tehran won relief from punishing worldwide economic sanctions.
While lifting nuclear-linked sanctions, the United States maintains sanctions related to Iran's ballistic missile program and human rights record.