If Russia is not excluded, at least Ukraine should also be invited to the G20 group as an observer, Biden added at a press conference at the North Atlantic Treaty Organisation (NATO) headquarters in Brussels on Thursday.
The US President is in Brussels to attend three summits addressing the Russia-Ukraine conflict, including the NATO extraordinary summit, the Group of Seven summit and the European Council meeting, Xinhua news agency reported.
Russia has not commented on Biden's statement so far.
Russian Foreign Ministry Spokesperson Maria Zakharova said in a statement on Thursday that NATO members have demonstrated their loyalty to Washington by vowing to follow its orders aimed at ultimately containing Russia.
She added that Washington once again "disciplined" its allies by pressuring sovereign countries and further erasing Europe's strategic autonomy.