The Sabres will provide an update on Montour's status once training camp has come to a close in about a week and a half.
Montour was acquired by the Sabres back on February 24 in a trade with the Anaheim Ducks that saw defenseman Brendan Guhle go back the other way along with a first round pick in 2019.
In 20 games with the Sabres last season, the right-handed defenseman scored three goals and picked up seven assists. He also registered 55 shots on goal while averaging 21:46 of total ice-time.
The Ohsweken, Ontario, Canada native is set to become a restricted free agent once the 2019-20 season is over.
The team also announced on Thursday that forward Scott Wilson and Casey Fitzgerald are both day-to-day with lower body injuries suffered during Tuesday's game in Columbus. Wilson did not finish contest after just 7:13 of ice-time, while Fitzgerald was able to skate in 19:23 of action.