"Last night I asked for and accepted John McCallum's resignation as Canada's ambassador to China", Trudeau said in a statement issued Saturday.
McCallum had come under fire this week when he told Chinese media in Toronto that Meng Wanzhou, Huawei's chief financial officer, had a strong case against extradition to the United States.
But on Friday he was quoted as saying it would be "great for Canada" if the USA dropped the request. She was being sought by the United States, which claims she committed fraud by lying to bankers about allegedly violating USA sanctions on Iran. In the meantime, in what some believe to be retaliation, Beijing arrested two Canadians - Michael Kovrig, a former diplomat, and Michael Spavor, a prominent consultant on North Korean business issues - on accusations of harming national security.
She was arrested on 1 December in Canada's western city of Vancouver at the request of the US.
Trudeau said as recently as Thursday that he had no plans to replace McCallum, who apologized the same day for his remarks earlier in the week.
Roland Paris, a former foreign policy adviser to Mr. Trudeau, said, "Mr. McCallum's remarks were continuing to cause confusion about Canada's position".
The federal government has tasked McCallum's right hand man in China Jim Nickel, up until now the Deputy Head of Mission at the Embassy of Canada in Beijing, as Chargé d'affaires to China in the wake of McCallum's resignation.
While McCallum's remarks might have played well in China, Ong said, they presented a problem for Freeland and other Canadian officials portraying Meng's arrest as strictly a legal affair.
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I feel so proud. "Again, when we see his performances we look forward to seeing more and more". But in the league he has yet to start a game, with his two appearances coming off the bench.
Canada's ambassador to China has been sacked after claiming that Huawei's CFO has a "strong case" against being extradited to the United States, and suggesting that Ottawa will be better off releasing the Chinese national.
He thanked Mr McCallum, a former minister in Mr Trudeau's Cabinet, for his 20 years of public service.
The Canadian government didn't return multiple messages in response to questions about whether McCallum is speaking for the Canadian government.
He said he spoke to China's consul general in Montreal on Thursday who reported that China is furious at Canada for arresting Meng on behalf of the US, which is involved in trade talks with China.
"He really made it untenable for the prime minister to sustain him (in his post) for any length of time and he had to go", Burton said by telephone, suggesting Trudeau should quickly appoint a special envoy to handle the dispute.
Mr. Trudeau and Ms. Freeland have stressed that Canada has an extradition treaty with the US that it must respect.
Meanwhile, US prosecutors are expected to file a formal extradition request with Canada soon.
Huawei has close ties to China's military and is considered one of the country's most successful global enterprises, operating in the high-tech sphere where China hopes to establish dominance.