Delivering his speech to the UN General Assembly in New York, Lavrov said Trump's pullout from the deal was part of a dangerous trend of unilateral measures that risk damaging the post-World War II global order, AFP reported.
The top Russian diplomat emphasized that the US move was a breach of UN resolutions and a threat to stability in the Mideast while Iran keeps carrying out all its obligations.
In a statement last month, the Russian Foreign Ministry said that Moscow "continues to consistently implement its commitments under the JCPOA... We reiterate our decisive commitment to take all the necessary measures to preserve and fully implement the JCPOA."
US President Donald Trump announced in May that Washington was pulling out of the nuclear agreement which lifted nuclear-related sanctions against Tehran in exchange for restrictions on Tehran's nuclear program. The deal had been signed between Iran and the five permanent members of the UN Security Council -- the United States, Britain, France, Russia and China -- plus Germany in 2015.
The US administration reintroduced the previous sanctions while imposing new ones on the Islamic Republic. It also introduced punitive measures — known as secondary sanctions — against third countries doing business with Iran.
A first round of American sanctions took effect in August, targeting Iran's access to the US dollar, metals trading, coal, industrial software, and auto sector. A second round, forthcoming on November 4, will be targeting Iran’s oil sales and its Central Bank.