US President Donald Trump has withdrawn an invite for Canada to join his newly constituted Board of Peace, in the latest spat between the North American neighbours.

"Please let this Letter serve to represent that the Board of Peace is withdrawing its invitation to you regarding Canada's joining," Trump said on Truth Social in a post addressed to Prime Minister Mark Carney.

Carney made headlines this week warning of a "rupture" in the US-led global order. Ottawa also said it would not pay to join Trump's new body.

The board, which gives Trump wide decision-making powers as chairman, is being billed by the US as a new international organisation for resolving conflicts.

Trump did not give a reason in Thursday evening's post as to why he had decided to revoke Canada's offer.