Power told reporters at the UN that the P5+1 – the United States Britain, France, Russia, China and Germany – have succeed in striking a deal that is “working”, therefore it “would be very wise to preserve” the agreement, Reuters reported.
Power said it was important that the Trump administration be "very strong" in enforcing the nuclear deal and "calling out the violations of international norms that occur outside the four corners of the agreement".
"It's important that the communication continue," she said.
Trump, who will take office on January 20, has threatened to either scrap the nuclear agreement or seek a better deal.
Trump’s pick for US secretary of state, Rex Tillerson, said Wednesday he would recommend a "full review" of the nuclear accord, though he did not call for an outright rejection of it.
But his nominee for the Defense Department James Mattis said on Thursday that the nuclear deal must be enforced though it is “imperfect”.
Iran has repeatedly said that the deal is not negotiable.
On Friday, Iran’s Deputy Foreign Minister Majid Takht-Ravanchi reiterated that Tehran will not allow any new nuclear case to be opened against the country.
The nuclear deal, known as the Joint Comprehensive Plan of Action (JCPOA), was clinched in July 2015.
According to the accord, which came into force in January 2016, the six world powers committed to lifting sanctions against Iran and the Islamic Republic agreed to limit its nuclear work in certain areas.
The Iranian diplomat further said that at a recent session of the JCPOA oversight committee, known as the Joint Commission, all participants stressed that no country would be allowed to affect the deal’s implementation.