The Italy international departed the Turin giants for England in the summer and has made 19 appearances in the Black Cats' stuttering season, scoring three times.
With Gus Poyet's side rooted to the bottom of the Premier League and rumours claiming that the 28-year-old has not settled on Wearside, some reports had linked him with a move back to Antonio Conte's Serie A champions but his representative, Furio Valcareggi, has dismissed any notion of a return.
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"First of all, I don't understand how he would be a target for Juventus, who are out of the Champions League.
"Secondly, contrary to what I keep hearing, the player is having a great time at Sunderland and his family are very happy in England.
"Most importantly, the English club do not want to lose the player.
"I've also spoken with Giaccherini's family and no one is aware of any interest from Juventus."
Giaccherini made 52 appearances in a two-year stint with Juventus prior to his Sunderland move, netting six goals.