Russian President Vladimir Putin says it wasn't his country's decision to leave the group of industrialized nations then known as the G-8.
Russia was expelled from the grouping in 2014 after it invaded and annexed Crimea and for its support for pro-Russia separatists in Ukraine.
President Donald Trump suggested ahead of arriving at the G-7 summit Friday that the group offer a seat at the table to Russia.
Putin, speaking after the summit of the Shanghai Cooperation Organization in the Chinese port city of Qingdao, said Sunday that it was the other member states' decision to skip a scheduled summit in Russia in 2014 and that they are welcome to Russia.
Trump had said Saturday that re-admitting Russia to the elite club would be "an asset," telling reporters, "We're looking for peace in the world."