Tony Accurso was hoping the high court would listen to his arguments aimed at overturning a pair of Quebec Superior Court decisions.
Accurso wanted to question certain witnesses as part of a bid to quash a subpoena calling on him to appear at the Charbonneau Commission. He had lost in two courts in Quebec.
The Supreme Court announced this morning it will not hear Accurso's arguments. As is custom, it did not give a reason why.
A Superior Court justice has yet to rule on whether Accurso should testify at the inquiry.
Accurso says testifying would hamper his defence in a number of criminal proceedings against him. He faces charges in several municipal corruption cases and is also charged with alleged tax fraud.