TEHRAN, Sept. 21 (Xinhua) -- Iran and the three European countries of France, Britain and Germany, collectively known as the E3, will hold talks on Tehran's nuclear issue in New York early next week, the semi-official Tasnim news agency reported on Sunday. Iran's Foreign Minister Seyyed Abbas Araghchi on Sunday left Tehran for New York as the head of a diplomatic delegation to attend the United Nations General Assembly (UNGA). Last month, the E3 triggered the JCPOA's "snapback" mechanism, which allows UN sanctions to be reimposed within 30 days if Iran is judged in breach of the accord. The JCPOA has been under strain since the United States unilaterally withdrew in 2018, prompting Iran to gradually reduce compliance. Since September last year, Iran has held several rounds of talks with the three European states, mainly focused on Tehran's nuclear issue and the removal of sanctions.