On the disabled list since July 29 with right knee inflammation, Morrison on Tuesday was evaluated by Dr. Richard Steadman in Vail, Co.
Steadman recommended three weeks of rest and rehabbing before the knee is re-examined.
The Marlins are hopeful Morrison will return this season from his patellar tendon injury. Surgery has been mentioned as a possibility, but that is being put off.
In 93 games, Morrison is batting .230 with 11 home runs and 36 RBIs.
Morrison opened the season in left field, but the Marlins envision him moving to first base next year.
The 24-year-old has been hindered by the knee all season. He had surgery on it last December.