Foreign Minister of the Islamic Republic of Iran, Mohammad Javad Zarif has rejected as "improper" the conditions set by the United States for upholding the 2015 multilateral nuclear agreement, urging Washington to immediately fulfill its commitments under the deal.

"A party to a multilateral agreement cannot set conditions for the deal. They [the Americans] have previously set some conditions that were improper. Their new conditions are improper as well," Zarif told reporters in Tehran on Saturday, Press TV reported.

Zarif said the US is using such demands as a diversionary tactic to evade accountability for its failure to fully honor its commitments under the JCPOA.

"The US sets conditions that the international community completely knows none of them can even be considered," the top Iranian diplomat added.

"What is now necessary is that the international community must receive an assurance that the US is fulfilling its commitments to preserve the rights of the Islamic Republic as a side that has remained committed to its undertakings. This is our current problem," the Iranian foreign minister pointed out.

Since the JCPOA Implementation Day in January 2016, the International Atomic Energy Agency (IAEA) has been monitoring Iran’s compliance with its nuclear-related commitments under the nuclear deal and has consistently verified the Islamic Republic’s compliance.

In its latest report on Thursday, the IAEA once again confirmed that Iran was living up to its commitments under the JCPOA.

The UN nuclear agency said the Islamic Republic was sticking to the deal's key parameters such as the number of uranium centrifuges and stockpiles.