Immobile has been on loan at Sevilla from his parent club Borussia Dortmund since July last year.
The 25-year-old was the leading scorer in Serie A in the 2013-14 season when he scored 22 goals.
He joined Dortmund for a fee of 18 million euros but struggled to make an impact in the Bundesliga and he was loaned to Sevilla.
Torino, 14th in Serie A, said on their website (www.torinofc.it) that Immobile had undergone a medical and trained with the squad.
Immobile’s glut of goals at Torino during the 2013-14 season is looking increasingly like an outlier. It is marks the only season he has broken double figures in a top flight. He may have scored 28 goals in 37 league games for Pescara but that came in the Serie B.
The hope for Immobile is that the familiar surroundings of Torino may coax more goals out of the Italy international. Having struggled at both Dortmund and Sevilla this does increasingly feel like a last chance for Immobile to prove he is an elite-level forward.