Much of his fellow members' anger stems from Trump's recent imposition of tariffs on imported steel and aluminum, but relations had already been soured by the USA pullout from an worldwide climate accord and a deal created to contain Iran's nuclear program.
Trump heading to Quebec for the meeting with the leaders of the other so-called G7: Canada France, Germany, Italy, the United Kingdom, and Japan. His predecessors pressed for freer global trade and championed a trading system that required countries to follow World Trade Organization rules.
The reading significantly undershot a Reuters poll of analysts, who had predicted a 0.8 per cent rise.
Nothing US President Donald Trump is doing will "make the world better, safer, or more peaceful", German Foreign Minister Heiko Maas told the daily Süddeutsche Zeitung on Friday.
Trump has spent much of this year engaged in a series of escalating trade wars with a number of countries, including US allies Canada, Mexico, and members of the European Union like France. "When we can underscore this, and we see that there's a lot of pressure within the USA, perhaps he will revise his position".
In a second tweet Thursday evening, Trump said Trudeau "is being so indignant, bringing up the relationship that the USA and Canada had over the many years and all sorts of other things". Despite his "bromance" with Trump, he too let the USA leader know he's not pleased with the new tariffs on steel and aluminum.
It has also been suggested that Mr Trump had not been keen to attend the summit at all, with expected criticism and his meeting with North Korean leader Kim Jong Un looming.
The president has vented privately about Canadian Prime Minister Justin Trudeau as their trade tensions have spilled into public view.
"In this environment, above all we always have to stay polite, stay productive and try to convince (them), to keep the United States on board because they are our historical ally and we need them", Macron told a news conference held with Trudeau in Ottawa on Friday.
Twice he attacked the Canadian prime minister on Twitter on Thursday and officials say the mood is likely to be exceptionally tense.
The EU also filed a complaint about the USA tariffs with the World Trade Organization.
"I regard this as much like a family quarrel". Signaling that his allies would not be intimated, Macron made it clear that the other six countries at G7 meeting would gladly sign deal without Trump.
Such a move towards separate talks would come at a tense time in USA trade relations with the two countries.
"This is the first time the US government is seen as truly acting in bad faith, in treating allies as a threat, in treating trade as negative and fundamentally undermining the system that it built, " said Adam Posen, president of the Peterson Institute for International Economics.