"He said three weeks ago that he had taken his decision; I'm not going to beg him to stay," Nicollin told reporters.
Girard took the reins at Montpellier in 2009 and guided them to a maiden Ligue 1 title last season.
They are currently sixth in Ligue 1 after 27 matches.
Get the best features, fun and footballing frolics straight to your inbox every week.
Thank you for signing up to Four Four Two. You will receive a verification email shortly.
There was a problem. Please refresh the page and try again.