A member of the US Senate Foreign Relations Committee warned Washington of being marginalized in case it withdraws from Iran's nuclear deal.

Democrat Sen. Ben Cardin of Maryland told the American television CBS on Sunday that any withdrawal from the nuclear deal the US and other permanent members of the UNa Security Council plus Germany signed with Iran in 2015 would be against US interests.

Under the agreement, known as the Joint Comprehensive Plan of Action (JCPOA), Iran agreed to curb its nuclear program in exchange for economic sanctions relief.

'I think both Senator Corker and I agree it be a mistake for the president to withdraw from the Iran agreement,' he said.

Other officials and experts have also warned of the repercussions of the possible withdrawal from the deal.

The international nuclear watchdog has repeatedly verified Iran's compliance with the JCPOA, but the US President Donald Trump has said that he will not certify it unless the 'disastrous flaws' are fixed.

'If the United States violates the agreement, we are isolating America not Iran from the international community,' the American senator said.

'By all indications Iran has not violated the agreement…Iran is complying with it and the United States would be marginalized by withdrawing from the agreement.'

So I hope that the president will recognize that we need to work with our European allies to make sure we're in lockstep against Iran.