A meeting of the G7 nations will be postponed until the autumn, the US President has said.
Donald Trump also called for an expansion of the group's membership because he considers it an outdated body that does not properly represent "what’s going on in the world".
The White House said Mr Trump wanted to bring in some of his country’s traditional allies and those impacted by the coronavirus to discuss the future of China.
The G7 members are Canada, France, Germany, Italy, Japan, the United Kingdom and the United States.
Mr Trump singled out Russia, Australia, South Korea and India as possible additions.
The meeting was originally due to take place in the United States from 10 June until 12 June, but plans had to be revised because of the coronavirus pandemic.
The US President cancelled the initially-planned meeting, before last week saying he was considering holding it again on a similar date and expressing a wish for it to be a face-to-face gathering, rather than be conducted by video conferencing.
However, reports in the US said Mr Trump was incensed that German Chancellor Angela Merkel swiftly signalled this week that she would not be attending as she believed June was still too soon to hold large gatherings amid the ongoing pandemic.
Mr Trump told reporters aboard Air Force One as he returned from the SpaceX launch in Florida on Saturday he had not yet set a new date.
He added that the gathering could take place in September around the time of the annual meeting of the United Nations.
The US President also said it might wait until after the US election in November.
Mr Trump has repeatedly advocated for expanding the group to include Russia, prompting opposition from some members including Canada’s Justin Trudeau, who told reporters he had privately aired his objection to Russian readmission.
"Russia has yet to change the behaviour that led to its expulsion in 2014, and therefore should not be allowed back into the G7," Mr Trudeau said at a news conference.
Cover image: Donald Trump giving a speech at the White House in January (Picture: PA).