Matias has not featured since May's play-off semi-final win against Brighton & Hove Albion at Hillsborough due to injury, and A Bola reported this week that the 27-year-old is a January loan target for Primeira Liga side, Chaves.
Wednesday's capture of West Brom winger Callum McManaman on Tuesday suggests the former Nacional da Madeira man, who scored three times in 22 outings last season, will struggle to get into the Owls' side upon his return to fitness.
However, speaking at Thursday's media conference, broadcast via Wednesday's official Facebook account, Carvalhal stressed that no conversation has taken place with Matias regarding a move.
"I never talk with Marco about that, never," said the 51-year-old. "If the clubs are interested in him, it’s normal. It’s normal that teams are interested in him like some [of] our players. This is normal in football but so far I never talk with Marco about the situation."
McManaman's arrival ensures that when everyone is fit, Carvalhal has a squad of over 30 senior players to choose from. However, when asked later on if the signing was made to compensate possible departures of key men next month, the Portuguese highlighted the promise he was made by chairman Dejphon Chansiri at the start of the campaign.
"We don’t have clauses to pay and go, we don’t have these [buy-out] clauses in the club as I know," he said. "So I never even think even if the press come that this club want this player or another to me it don’t mean absolutely nothing because the chairman don’t want to sell any player.
"He was very strong [on] this at the beginning of the season."