Marcelino says he's fully committed to Villarreal next season.
There has been talk of the coach stepping down this summer.
But he said: If I said I'm leaving and then staying? If I say I'm going, I wouldn't continue. I've always been one to think what I say and once the decision is made, it's made."
Marcelino also commented on the retirement of Real Madrid midfielder Toni Kroos.
For football it's a negative surprise, it's a shame," he added. "Real Madrid doesn't have anyone else of his profile. The feeling is usually that footballers tend to play for too long, but this is the opposite. I was surprised, because he's an undisputed starter."