The statement came a day after Trump again continued the USA participation in the accord, but vowed to "withdraw from the deal immediately" if what he described as "flaws" in the agreement aren't fixed.
Iran says its nuclear programme is only for peaceful purposes.
"But in his statement, the president will also make clear that this is the last such waiver that he will issue".More news: Important Analyst Opinions: GrubHub Inc. (GRUB), British American Tobacco plc (BTI)
Under U.S. law, the sanctions can be waived for a maximum of 120 days, meaning the U.S. government must review the situation every four months.
Continuing to maintain and implement the Iran nuclear deal is the responsibility of all parties concerned, and is the common wish of the worldwide community, said Wang, adding that this will help uphold global non-proliferation regime, maintain regional peace and stability as well as solve other hot issues in the world.
"It also will not allow the [deal] to be linked to any other issue", a foreign ministry statement from Tehran said. US and other officials have complained that Iran's ballistic-missile program can easily be converted for nuclear use.
In October, Trump decertified the nuclear deal under US law, saying the sanctions relief was disproportionate to Iran's nuclear concessions, and describing the arrangement as contrary to America's national security interests.
Trump in October of past year said the US would not certify the Iran nuclear deal, and pushed it to Congress to fix the deal's "serious flaws" in order to protect the American people.More news: Signet Jewelers (SIG) Earns Daily News Impact Rating of 0.10
The Trump administration also said it hopes for an amendment to congressional legislation that imposes triggers on Iran of its own- and that for the first time characterizes Tehran's ballistic missile program as "inseparable" from its nuclear work, bringing with it harsh sanctions. "Staying in this deal, which is a strong one, is vital to enhancing America's, and the world's, security, and avoiding a nuclear arms race in the Middle East". Trump has complained that numerous Iranian restrictions expire next decade and has vacillated between talk of toughening the deal and pulling the USA out entirely.
Despite the lopsided cohort in favor the deal, the president has continued to recoil at the prospect of extending sanctions to Iran given his personal animus toward the deal and campaign promise to rip up the worldwide accord during his first term in office.
Mr Trump has repeatedly criticised the accord, while Iran has accused the USA of failing to comply with it.More news: Manchester United want Mesut Ozil and Alexis Sanchez at Old Trafford