T S Dhillon landed in Canada with his wife on May 18 and was put on the return flight to India on May 20.
His wife was, however, allowed to proceed to her destination in Canada.
"I landed with my wife in Canada on May 18 as I had a family event to attend. But the Canadian border agency at the airport did not allow me to enter the country.
External Affairs Ministry Spokesperson Gopal Baglay termed the characterisation of a reputed force like the Central Reserve Police Force (CRPF) as "completely unacceptable".
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"We have seen the news report regarding denial of entry by Canadian authorities to a senior retired Indian Police Officer. Such a characterisation of a reputed force like the CRPF is completely unacceptable. We have taken up the matter with the Government of Canada," Baglay said.
Dhillon retired from the Central Reserve Police Force as an Inspector General (IG) in 2010.
He was a national level shooter and instrumental in setting up infrastructure for the shooting discipline during the 2010 Commonwealth Games held in the national capital.
Dhillon said he had a valid visa for Canada till 2024 but despite that he was not allowed to enter the country.
"The authorities should apologise," he said.
The officer said while his wife was allowed to enter Canada, he had to leave with a heavy heart, from a country he has visited many times in the last 30 years.
Ties between India and Canada are witnessing a strain in the recent past.