"As a result, the U.S. policy on the economic clampdown of Iran negatively affects the IAEA inspections in Iran", Ulyanov said.
The ambassador called on Iran to reverse its nuclear steps and halt any plans for further advancements in the future.
And now, Tehran's official position is that it will only talk to the United States if Washington removes the JCPOA-related sanctions that it implemented past year.
President Donald Trump warned on Wednesday that US sanctions on Iran would be increased "substantially" soon, as the United Nations nuclear watchdog held an emergency meeting at Washington's request to weigh Tehran's breach of a nuclear deal.
"Iran has always been secretly 'enriching, ' in total violation of the awful 150 Billion Dollar deal made by John Kerry and the Obama Administration", Trump wrote on Twitter.
As part of its campaign, the US has re-imposed sanctions on exports of Iranian crude oil, which have tanked the Iranian economy.
President Donald Trump is threatening to ratchet up sanctions on Iran and again denounced the 2015 nuclear deal Iran signed with world powers.
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Diplomats are gathering in Vienna for a special meeting of the board of the U.N. atomic watchdog requested by the United States to discuss Iran's nuclear program. It has offered to return to the agreement, but Trump has long rejected the deal, saying it was too generous to Tehran and did not address its involvement in regional conflicts.
Rouhani told Bonne Iran seeks "full implementation" of commitments from all parties to the agreement, and "if signatories to the deal implement their commitments, Iran also will take new steps", according to Rouhani's website. But Iran says it must first be able to export as much oil as it did before the USA withdrawal.
France and other countries have called on Iran to go back to complying with the nuclear deal after Tehran increased uranium enrichment beyond the limits set by the deal.
The IAEA board of governors met on Wednesday at the request of the United States as Iran is reducing its commitments in response to the USA abrogation of the nuclear deal (JCPOA) and the return of sanctions.
Last month Trump said he had called off a retaliatory military strike against Iran at the last minute after Tehran shot down a United States drone that it said had crossed into its airspace, a claim denied by Washington. "It is imperative that this misbehaviour not be rewarded, for if it is, Iran's demands and provocations will only escalate". Since then, it also announced it has started enriching uranium past the 3.67 percent purity allowed, to 4.5 percent.
The Trump administration placed two Lebanese lawmakers from Tehran ally Hezbollah on its sanctions blacklist Tuesday, but stopped short of carrying out an earlier threat to impose such measures on Iran's top diplomat.
Britain, France and Germany are considering their next move, torn between the urge to show their displeasure at Iran's breach of the deal and wanting to keep alive a pact that signatories in 2015 touted as vital to preventing wider war in the Middle East. Shamkhani went on to criticise European countries for their "lack of will" in providing relief from U.S. sanctions. He warns London: "You are an initiator of insecurity and you will understand its repercussions", without elaborating.