Friday's shooting in Newtown, Conn., left 20 children and six adults dead at the school, along with the gunman and his mother.
Paramount Pictures then postponed the Saturday U.S. premiere of the movie, which was filmed in Pittsburgh and is set to open Dec. 21.
The studio says Cruise will return to Pittsburgh on Wednesday to screen "Jack Reacher" for fans. It says there won't be a red carpet but Cruise will introduce the film.
The showing will be for previously confirmed guests.