No Talks With Washington Underway

Foreign Minister Mohammad Javad Zarif denied any engagement in negotiations with the United States, saying Americans have proved unreliable in adhering to agreements. 
"There is no negotiation. Americans have shown that negotiation with them and the results of it cannot be trusted," he was quoted as saying by IRNA. 
Tehran entered talks with the US, its traditional adversary, within the framework of P5+1 (five permanent members of the United Nations Security Council, plus Germany) in 2015, which culminated in the landmark nuclear deal, formally known as the Joint Comprehensive Plan of Action. 
Iran agreed to curb its nuclear program in return for the lifting of all international sanctions, but US President Donald Trump withdrew from the agreement in 2018 and reimposed tough sanctions on Tehran. 
Trump argued that the deal was "defective" and launched a campaign of maximum pressure to force Iranian leaders to agree to new terms under a more comprehensive deal. 
Iran has refused to open direct dialogue with the US unless it removes all sanctions and returns to the negotiating table with the remaining JCPOA signatories. 
Rumors have been flying about talks between the two countries, particularly after the Iranian Government Spokesman Ali Rabiei said Tehran was ready for a full prisoner exchange with the US without preconditions.
Tehran and Washington have had no diplomatic relations since the 1979 Islamic Revolution in Iran. Switzerland looks after US interests with Tehran.
Zarif denied any such engagement, reiterating Iran's reluctance on negotiating with Washington. 
"The whole world has come to the conclusion that if they make any agreement with the US, Americans could disregard it at any moment," he said. 
Trump has been withdrawing the US not only from the JCPOA, but from other international agreements, including the Paris climate accord and the North American Free Trade Agreement which he later replaced with a new one. 
He even withdrew funding to the World Health Organization at a critical time when the world is battling a coronavirus pandemic.
As the latest move against the Islamic Republic, the Trump administration is trying to use its power as a member of the UN Security Council to extend Iran's arms embargo set to expire in October as per UN Resolution 2231 that endorsed JCPOA. 
The US State Department argues that although Washington is no longer a party to the nuclear deal, it is still an original participant under the terms of UNSCR 2231. 
Tehran has warned JCPOA members and the UN about the dire consequences of any violation of the resolution, stressing that the lifting of arms ban was among the benefits promised to Iran under the deal and is an unquestionable right of the country.