He added that the Joint Comprehensive Plan of Action, the formal name for the nuclear deal, is not just a deal between Iran and the USA and Iran has interaction with the other five signatories.
"Since the nuclear deal was implemented in January 2016, the JCPOA has dramatically reduced the risk posed by Iran's nuclear program and mandated unprecedented monitoring and transparency measures that make it very likely that any possible future effort by Iran to pursue nuclear weapons, even a clandestine program, would be detected promptly", the statement read.
Iran's government spokesman Mohammad Baqer Nobakht said on Wednesday that the nuclear deal was signed between Iran and six countries, not just the US, and definitely a "rearrangement" will be on the way if the Trump administration quit the multilateral agreement.
President Donald Trump was a critic of the Iran deal as a candidate, but since taking office he has not taken steps to abandon it. Economic sanctions against Iran were dropped in exchange for Tehran limiting its nuclear program.
Last week, Nikki Haley, the USA ambassador to the United Nations, called the deal a "very flawed and very limited agreement" and contended that "Iran has been caught in multiple violations over the past year-and-a-half". The group said it was "concerned by statements from the Trump administration that it may be seeking to create a false pretext for accusing Iran of noncooperation or noncompliance with the agreement in order to trigger the reimposition of nuclear-related sanctions against Iran".
The experts who signed the letter, though, described the agreement as "an effective and verifiable arrangement that is a net plus for global nuclear nonproliferation efforts" and warned against leaving it.