G7 allies criticised Trump's decision to reject a joint communique, the BBC reported on Monday.
Trump said a photograph released by German Chancellor Angela Merkel's spokesman that went viral captured a friendlier mood than what the snapshot conveyed to many analysts. The French presidency had earlier condemned "fits of anger".
Trump accused the Canadian prime minister, Justin Trudeau, of being "dishonest and weak" for pointing out that America's excuse for imposing aluminum and steel tariffs on his country - that they pose a national security threat to the United States - makes no sense.
In a statement to MPs on the summit, Mrs May praised Mr Trudeau's "skilful" handling of proceedings and said the leaders had established "common ground" on a range of matters.
The United States is Canada's single biggest trade partner, with two-way exchanges of goods and services totalling $673.9 billion in 2017, and Washington enjoys a $8.4 billion surplus.
Monday's symbolic House vote was held after Mr. Trump criticized Mr. Trudeau over the weekend for vowing to retaliate against tariffs recently imposed by the USA on Canadian steel and aluminum products.
The President tweeted on Monday that America was paying disproportionately more towards the costs of the North Atlantic Treaty Organisation (Nato) than fellow members.
Premier Wade MacLauchlan publicly expressed his support in the legislature for Prime Minister Justin Trudeau on Tuesday, in the wake of the growing U.S.
Trump went on to say that the USA gets "unfairly clobbered" on trade despite "protecting Europe at great financial loss".