The former Liverpool star has been linked with Juve this past week.
"Please, let us not talk about Mascherano going to Italy," Horacio Zandonadi told Radio Mana Mana on Monday.
"Let's not joke. Mascherano plays for Barcelona or, in other words, the best club side in the world.
"He wouldn't consider his future, not even if Juventus or Milan made an offer for his services," added Zandonadi.