The suspension is to begin Saturday, when the Pacers play at Sacramento, and would end Jan. 23.
"We are very disappointed with the news that David Harrison has been suspended," Pacers President of Basketball Operations Larry Bird said in a statement released by the team. "This is a private matter and we will do what we can to provide David any help going forward."
No details of the violation were released.
Harrison averaged 4.4 points and 2.2 rebounds over 27 games this season.