A Waterloo man who served as an interpreter for the Nazis has lost his latest attempt to avoid deportation.

Helmut Oberlander, 90, was part of a Nazi death squad that executed thousands of civilians – mostly Jews – during the Second World War.

He became a Canadian citizen in 1960.

After a court found that he failed to disclose his wartime activities, his Canadian citizenship was revoked.

Two previous appeals of the revocation were successful, but the third and most recent was not.

In a statement, Oberlander’s daughter said her father has been through a “long and difficult journey” but plans to continue fighting to remain in Canada.

“He believes the government is engaging in a ‘malicious prosecution,’” Irene Rooney said.

“He wants to see justice done and wants his good name restored.”

Oberlander’s lawyer says the decision will be appealed further.