Canadian Prime Minister Justin Trudeau's position on the punitive measures would remain "consistent and clear" during talks at the summit, the official said.
It said: "Both leaders discussed the migration problem in Libya, and timelines to solve it. President Trump underscored the need to rebalance trade with Europe".
"We just go and do things", he added.
A short White House readout of the call with Macron said the conversation was focused on trade and immigration.More news: U.K. Government Debates Changing Northern Ireland’s Abortion Laws
German Chancellor Angela Merkel said she expected "difficult discussions" at the summit while Canada and Mexico already have retaliated against a range of USA exports and the European Union has promised to do so as well, raising the specter of a tit-for-tat escalation.
Macron reportedly lashed out at Trump's recent decision to impose tariffs on imports from American allies, saying they were "illegal" and a "mistake". I'm always the optimist.
PARIS French President Emmanuel Macron said on Tuesday his phone calls with US President Donald Trump and other world leaders were like sausages - better not explain what is inside. Trudeau had called Trump's national security argument "insulting" and said the tariffs are "totally unacceptable".
That statement said "we reiterate our commitment to keep our markets open and to fight protectionism, while standing firm against all unfair trade practices". "Frank, yes", the official said.More news: Reese Witherspoon confirms 'Legally Blonde 3'
"His preference now - and he asked me to convey this - is to actually negotiate with Mexico and Canada separately", Mr Kudlow said.
"But we don't have high expectations they will influence President Trump", he said.
French lawmakers began debating Thursday a ban on mobile phones in public schools, one of President Emmanuel Macron's campaign pledges which critics say will do little to counter classroom disruptions or limit cyberbullying.
Macron and Trudeau are presenting a united front ahead of the G7, with the French president tweeting of his country's "convergence" with Canada on Wednesday.More news: Melania Trump First Official Look Following Surgery
Trump raised the issue of US vehicle imports with Abe at a meeting in Washington and said he wanted more investment plants in the American industrial heartland of Michigan, Pennsylvania and Ohio.