According to Italian media Inter will pay Sanchez €five million ($5.1 million) to end his time at the San Siro.
In return Inter get Sanchez’s €seven million salary, one of the highest at the club, off their books as they try to cut their wage bill.
The 33-year-old, who signed for Inter in 2019 but never established himself as a starter, was not part of Simone Inzaghi’s plans after the return of Romelu Lukaku this summer.
Marseille president Pablo Longoria said on Sunday that he was interested in bringing Sanchez to Ligue 1, saying to Prime Video that he was “the sort of profile we want”.