The Owls have had several injury issues to deal with in recent weeks.
Hammill was sent off in Barnsley's last encounter with Sheffield Wednesday in December.
Sheffield Wednesday are out of sorts heading into Saturday's trip to Oakwell.
The Sheffield Wednesday midfielder put in several robust challenges against Leeds United on Saturday.
Leeds United face Sheffield Wednesday in a crucial Yorkshire derby towards the top of the Championship on Saturday.
Saturday's play-off tussle could be crucial in the seasons of Sheffield Wednesday and Leeds United.
Sheffield Wednesday look to be in with an excellent chance of qualifying for the Championship play-offs.
Sheffield Wednesday can extend their lead over seventh place with a win against the Blues at Hillsborough.
The midfielder has been in fine form at Hillsborough this season.
The midfielder penned a new deal until 2020 on Tuesday.