The lawyer for a Canadian awaiting execution in a Montana prison says he was shocked by the federal government's announcement it will no longer seek clemency for his client.

In the past, the government has requested that Canadian prisoners sentenced to death in the U.S. be allowed to serve out life sentences here, since Canada opposes the death penalty.

The apparent change of heart came as a blow to Don Vernay, lawyer for Albertan Ronald Allen Smith, who faces lethal injection for the 1982 murders of two men in Montana.

"I mean, talk about having the wind knocked out of you. I'm astounded, is all I can say," Vernay told CTV's Canada AM on Friday.

Public Safety Minister Stockwell Day announced in the House of Commons on Thursday that he will not plead for clemency for Smith, since he had been found guilty in a democratic country "that supports the rule of law."

On Friday, Prime Minister Stephen Harper confirmed Canada has no interest in wading into the debate over capital punishment, and would not be coming to Smith's aid.

"The reality in this particular case is, were we to intervene, it would quickly become a question of whether we were willing to repatriate a double murderer to Canada," Harper told reporters.

"In light of this government's strong initiatives on tackling violent crime I think that would send the wrong signal to the Canadian public."

Vernay said representatives of the federal government contacted him about a year ago and said they intended to try and bring Smith home.

"They came to us and they said we want Mr. Smith back in Canada, he's one of our citizens," Vernay said.

"We want the death penalty lifted and we are going to do whatever we can to secure his transfer to Canada and to have the governor of Montana grant clemency. And so we were pleased and we were surprised."

Vernay said he flew to Montana and met with the staff of Gov. Brian Schweitzer late this summer, and got the sense the clemency request was on the agenda.

"It was in the preliminary stages but everybody knew that this is what was on the agenda," Vernay said.

"And we had the Canadian government 100 per cent behind us and then all of a sudden out of nowhere comes this statement."

Vernay said the decision seems to fly in the face of Canada's position on the death penalty and sends a confusing message to the world.

"For your government to make a statement like that to the world internationally that you now support the execution of your own citizens -- what can I say? I mean, it's breathtaking in terms of its implications."

Smith was convicted for killing two Aboriginal men while hitchhiking through Montana in 1982. He is the only Canadian currently on death row in the U.S.

Relatives of the two men, Harvey Mad Man, 23, and Thomas Running Rabbit, 20, have pleaded with Schweitzer not to commute Smith's sentence.

Smith personally requested the death penalty, before later appealing the decision, asking for a life sentence.

Schweitzer said he is undecided about whether to commute his sentence.