The 29-year-old was in noticeable pain during the latter stages of last Thursday night's loss to Carlton, appearing hampered as he moved around the field.
The Geelong Advertiser's Matt Forrest reported Cameron did not train with the team on Monday.
It is understood that star Cat Jeremy Cameron is battling a rib injury and is a chance to miss Sunday's game against Gold Coast. The Geelong forward did not train this morning #GeelongStrong
— Matt Forrest (@mattforrest29) March 27, 2023
Cameron, after helping propel the Cats to a premiership last season, has had a blistering start to the new campaign, most recently kicking six goals and notching 25 possessions on Thursday in spite of the apparent ailment.
The Cats are already under injury duress, as defender Tom Stewart and utility Jack Henry remain absent, and defender Sam De Koning and forward Tom Hawkins have also had injury concerns to begin the season.
Geelong and Gold Coast both enter Sunday's clash winless on the young season, with the match-up to take place at Heritage Bank Stadium at 2:10 PM AEDT.