During the two-day meeting, the two sides’ experts tried to finalize measures prior to the implementation of the deal, dubbed as the Joint Comprehensive Plan of Action (JCPOA).
The Iranian delegation was chaired by Foreign Ministry's Director General for International and Political Affairs Hamid Baeedinejad.
“The countdown has begun for the implementation day and the removal of (anti-Iran) sanctions,” Baeedinejad said in a message shared on his Instagram page.
Iran and the Group 5+1 (also known as P5+1, E3+3) reached the nuclear deal on July 15, 2015 after several rounds of intensive diplomatic talks.
The agreement would see the removal of nuclear-related sanctions against Iran in return for enhanced transparency by Iran in its peaceful nuclear program.