Iran and the Group 5+1 (Russia, China, US, Britain, France, and Germany) on July 14, 2015, reached a conclusion over the text of the nuclear deal.
Iran has said it will boost its uranium enrichment in a few hours above a cap set by the nuclear deal, a move that could mean the return of all economic sanctions on Tehran.
The Iranian spokesman, however, said no new negotiations have been proposed regarding the USA return to the nuclear deal during French President Emmanuel Macron's talks with his Iranian counterpart Hassan Rouhani.
As part of its campaign, the US has re-imposed sanctions on exports of Iranian crude oil, which have tanked the Iranian economy.
Iran's representative to global organizations in Vienna, Kazem Gharib Abadi, told a meeting of the worldwide Atomic Energy Agency Wednesday U.S. actions were "neither legitimate nor legal" and should not be accepted by the global community.
"What we're doing only has one aim: We want to preserve the nuclear treaty", Iran's envoy to the Vienna-based authority was cited as saying by weekly newspaper Die Zeit.
Kazim Gharib Abadi, Iran's ambassador to the IAEA, told reporters following Trump's accusation that all Teheran's nuclear activities were being monitored by IAEA inspectors.
However, the EU's failure to ensure Iran's economic interests forced Tehran to stop honoring certain commitments, including an unlimited rise in the stockpile of enriched uranium.More news: Nintendo Switch Lite drops September 20 for $100 less than the original
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According to the International Atomic Energy Agency (IAEA), tasked with inspections, while Iran consistently lived up to its commitments under the deal until recently, it is now in breach of two of them.
At the same time he slammed the US decision to withdrawal from the deal and reinstate sanctions, saying it was "neither legitimate nor legal" and should not be accepted by the global community.
Separately a senior Iranian security official said on Wednesday that Iran will not reverse its decision to increase uranium enrichment beyond the limits until it achieves its "full rights" under the deal.
At Wednesday's UN International Atomic Energy Agency's (IAEA) board meeting, the United States sought to pressure Iran over breaches of the 2015 international nuclear deal, accusing it of extortion and pledging to continue sanctions while still offering to hold talks.
In a tweet, Iranian Foreign Minister Mohammad Javad Zarif said it was ironic Wednesday's meeting had been called by the United States, given it had withdrawn from the nuclear deal and "punishes all who observe it".
About the seizure of the super tanker he went on to say that the tanker is not Iran's property and had not been sailing under an Iranian flag, therefore, legal measures must be taken by its owners. That has been a political nonstarter in Washington, meaning that the prospect of negotiations between Washington and Tehran remains bleak. Since then, it also announced it has started enriching uranium past the 3.67% purity allowed, to 4.5%.
The Trump administration killed the JCPOA in May 2018 and has imposed the toughest ever sanctions on Iran. Shamkhani went on to criticise European countries for their "lack of will" in providing relief from United States sanctions.
President Hassan Rouhani said in May that Iran would roll back its commitments under the deal in stages every 60 days in an effort to force the other parties to deliver on their side of the bargain. "You are an initiator of insecurity and you will understand its repercussions", he warned the British government, calling for the "full security" of global shipping lanes.