That statement sought to overcome deep disagreements, notably over trade.
"Let's be serious and worthy of our people".
Germany also said it would abide by the communique.
So how did the latest spat unfold?
As for the prospect of new trade deals touted by the Trump administration, Alden says they are a pipe dream.
Trump said that retaliation is a "mistake", according to Trudeau.
Canada is "polite, we're reasonable but we also will not be pushed around", Trudeau added.
France warned Sunday that "fits of anger" could not dictate global cooperation after US President Donald Trump abruptly rejected a joint statement agreed following a bad-tempered G7 summit in Canada.More news: G7 agrees to fight protectionism as Trump threatens allies on trade
"There's some movement within Congress now to rein in Trump on trade policy", Gertz said.
G7 leaders, led by Prime Minister Justin Trudeau, Germany's Angela Merkle and French President Emmanuel Macron confronted Mr. Trump with a slew of data on import and exports to sway his thinking, but the President was unmoved.
His statements on the sidelines of the contentious G7 summit come just weeks after his administration slapped metals tariffs on Canada, the European Union and Mexico, who quickly announced their own retaliatory measures.
What is in the joint communique?
"Things are moving forward at the G7", Macron told reporters at the start of their own one-on-one talks which followed bilateral talks among all the group's leaders.
While talking tough with USA allies such as Canada and the E.U., Trump repeated his call for Russian Federation to be allowed back into the elite club, which includes Britain, Canada, France, Germany, Italy, the US and Japan.
Climate: An agreement to disagree.
The US president warned that retaliation against metal tariffs - 25% on imports of steel and 10% on aluminium from countries including the United Kingdom and the rest of the European Union - would be a mistake after previously calling the EU approach to business "brutal".
"It's a little worse within North America - the underlying bargain was that United States neighbors would receive special treatment", Alden said in the same press call.
The EU then announced tariffs on USA goods ranging from Harley-Davidson motorcycles to bourbon. How real is this threat, and can Canada do anything to prevent Trump from making good on it?
What is the G7?
Instead, Canada will likely issue a chair's summary of the meeting listing the major topics of discussion. Russian Federation joined the G-7 in the 1990s, making it the Group of Eight, but was expelled after its annexation of Crimea in 2014. A frenzied effort last month to reach a deal that could pass the current U.S. Congress by the end of this year has stalled, in part after Trudeau's final push ran up against Trump's insistence on a five-year sunset clause that would see the pact renegotiated or killed after five years.