Speaking to the Sydney Morning Herald, Beltrame said, "It's very, very disappointing.
"I'm gutted. It's not a good thing that before the season starts you find out you're not going to be part of it, but in the end you just have to move on.
"I will keep training and working hard with my rehabilitation because I'm still contracted to the club and hopefully I can recover and get through this."
The injury is likely to keep him out of action until March next year.