Iran's ambassador to the UK Hamid Baeidinejad said that the US withdrawal from the Iran nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA), will result in its termination.
"When the United States is out of the deal, it means that there is no deal left," Baeidinejad said during an interview with CNN.
"Because an important party of the treaty has abrogated and violated in clear terms the treaty," he added.
He further noted that Tehran would "be ready to go back to the previous situation" if the Washington ditches the JCPOA as threatened by US President Donald Trump.
"It could be enriching uranium, it could be redefining our cooperation with the agency and some other activities that are under consideration," he also said.
Baeidinejad stressed that whatever Iran's counter move would be it would not concern the development of nuclear weapons.