The United States has been listed as a country where prisoners are at risk of torture in a training document produced by the Canadian foreign ministry.
It also classifies some US interrogation techniques as torture.
The manual - part of a training course on torture awareness for diplomats - also includes Israel, China, Iran and Afghanistan on its watch list.
A government spokesman said the manual did not reflect the views of Canada, which is an ally of the US and Israel.
"The training manual is not a policy document and does not reflect the views or policies of this government," said a spokesman for Foreign Minister Maxime Bernier.
The manual lists US interrogation techniques such as forced nudity, isolation, sleep deprivation and the blindfolding of prisoners under "definition of torture".
It also refers to the US detention camp at Guantanamo Bay in Cuba where a Canadian man is being held. Critics say it ridicules Ottawa's claims that Omar Khadr is not being mistreated.
There was no immediate response from either the US or Israel.
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