The Brazilian centre-back has been credited with saying he would be open to a move to the Nou Camp if the opportunity arose but Mourinho understands his most recent quotes are of a different nature.
"I don't know if he said that. What I can say is that he is not going to," he said.
"The last quotes I read were Luiz saying he is not speaking about clubs when he is with the national team, which is a fantastic quote that I appreciate.
"When they are with the national team they are national team players, they are not club players.
"That is the last quote I have and it is an intelligent one."