In particular, the president said on Tuesday to several advisers that he fears attending the Group of Seven summit in rural Charlevoix, Quebec, may not be a good use of his time because he is diametrically opposed on many key issues with his counterparts - and does not want to be lectured by them.
But before leaving Washington, he made clear that he too has no intention of backing down on his plan to rebalance trade by imposing tariffs on steel, aluminum and other goods imported from U.S. allies. And Trump is not likely to back down.
The US president says the tariffs on aluminium and steel are necessary to protect American industry.
"The American President may not mind being isolated, but neither do we mind signing a six country agreement if need be", Macron tweeted. "Because these six represent values, they represent an economic market which has the weight of history behind it and which is now a true global force", he tweeted.
"Please tell Prime Minister Trudeau and President Macron that they are charging the US massive tariffs and create non-monetary barriers", he wrote.
Trump fired back soon after on Twitter, addressing both leaders directly, saying they were charging "massive tariffs" on United States goods and had erected other trade barriers. "Look forward to seeing them tomorrow", he said.
The White House subsequently announced the president would be leaving on Saturday, before the summit formally ends, to fly to Singapore for a meeting with North Korean leader Kim Jong Un.
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Some in the crowd, closely watched by riot police, carried banners with slogans such as "The G7 does not represent us". So what are the points of friction between Trump and the other members of the exclusive club.
With the leaders of the Group of Seven industrialised democracies due in Quebec, Canada's Prime Minister Justin Trudeau warned the United States leader that they would not roll over on trade tariffs.
Trump is said to bristle at the British Prime Minister's phone calls, as May launches into policy detail rather than broader conversation.
Trump raised the issue of U.S. auto imports with Abe at their meeting in Washington and said he wanted more investment in plants in the American industrial heartland of Michigan, Pennsylvania and Ohio. She was not named among world leaders due to sit with the USA president.
Mr Altmaier also underlined the importance of European unity on free trade and economic interests, especially since domestic debate was continuing in the United States about punitive sanctions imposed by Mr Trump on G7 allies. The steel tariffs also affect the other G7 member, Japan, which was never granted a waiver.
The Canadian leader is also embroiled in a row with Washington over negotiations to revamp the nearly 25-year-old the North American Free Trade Agreement.
"The six other G7 countries combined form a larger market than the American market".
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"We know that the European Union is quite preoccupied with this as well, and Mr. Macron is now the recogniced leader of the European Union", he added.
Germany has suggested making accommodations over trade with the U.S. for fear of triggering a ratcheting up of tensions over cars that would embroil companies like BMW and Mercedes.
Europe faces renewed domestic economic and political challenges in addition to those posed by Trump's unilateralism.
Italy's Giuseppe Conte, who was only confirmed as prime minister this week, will be meeting his fellow leaders for the first time.
Japan is also expected to take a less confrontational approach, while quietly pressing its case on trade.
A humiliated Mr Macron then delivered a speech in Congress that repudiated much of Mr Trump's agenda, restating his commitment to both the Iran nuclear deal and the Paris climate agreement that Mr Trump has turned his back on.
The pair have enjoyed each other's company on the golf course and issues such as the Iran nuclear deal which have soured relations with Europe have had relatively little impact on ties between Tokyo and Washington.
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It believes maintaining sanctions will give the USA the upper hand in negotiations with North Korea. It has supporting infrastructure that is also of concern", he said.