No specific details regarding the investigation were released but Edinburgh said Hardie had been handed "a range of sanctions" including the suspension and will be available for selection in mid-January 2018.
"I would like to apologise to everyone for putting myself in this situation," Hardie said in a statement on the club's website.
"Through my actions I feel I have let my club, my teammates and the fans down. I want to acknowledge the support I have had from Edinburgh Rugby and Scottish Rugby in dealing with the issue.
"I am now focussed on putting myself in the best possible position to be considered for selection again."
(Reporting by Aditi Prakash in Bengaluru)
