Camarasa has played only seven minutes of football in the last five weeks because of a calf problem.
Bluebirds manager Warnock says Camarasa has been absent even when Cardiff's medical staff assessed him to be fit.
"He obviously listens to his physios, his medical people and Tom, Dick and Harry from abroad," Warnock said.
"There's nothing we can do about that. I imagine a lot of Premier League players are like that at the minute.
"He's a very important player for us and it's been a really big disappointment.
"I've never come across the situation I've got at the moment. We're having physios and medical people from abroad telling us what we can do with him when he is our player.
"I think it's down to the player really. If you saw Sol Bamba's scan on his thigh, he wouldn't have played for the last six weeks, and he's been our best player.
"He tells me 'I'm all right gaffer' and I think that shows the make-up of certain players is stronger than others."
Camarasa has been one of Cardiff's top performers since joining the club on a season-long loan from Real Betis last August.
Need a VPN? Or seeking to switch? Then support Tribal Football by clicking here to sign up with our official partners NordVPN. Not only will you receive the best VPN experience, but also great discounts by signing up via Tribal Football. Thanks for your support!