The Spain international has been linked with a sensational move to the Catalan giants and the former Valencia man thinks a transfer to Camp Nou is a realistic option
The Blancos captain lost his starting berth to Diego Lopez last season while Jose Mourinho was still at the helm, and is also seemingly second choice under new coach Carlo Ancelotti.
Consequently, Canizares would not the discount the possibility of Casillas departing for Camp Nou before the close of the transfer window.
"I don't see any problems if he were to leave Madrid for Barcelona," Canizares told Cadena SER. "At Barcelona - and anywhere else in the world - he would get the recognition he deserves.
"What matters most is your job and if you can't do it at your current club, you will have to look elsewhere. If I were Casillas, I would start thinking about leaving Madrid. This situation is not normal.
"The current situation at Madrid is very uncomfortable for both goalkeepers. I have never thought that having two great shot-stoppers at one team was a good idea. Casillas is always the centre of attention at the moment."
Casillas has a contract with Madrid until June 2017.