The fullback was left on the bench by Arbeloa until the 84th minute in last night's 2-1 win against Alaves.
Canizares said on Cadena Cope: "Carvajal does not deserve the treatment he has received from Arbeloa.
"This is a story we don't know. It might be related to the coach, if it's because his contract is ending... but it's disrespectful that a player of Carvajal's caliber hasn't had any playing time this season. Poor guy.
"Carvajal doesn't deserve the treatment he's received from Arbeloa! He doesn't deserve it.
"Carvajal is a Real Madrid legend and I repeat, if he's lame or injured... let him play so everyone can see it, but let him have the opportunity at some point to prove himself.
Dani Carvajal is too important a figure for Real Madrid not to have even a little bit of decency towards him."