That list includes a number of key men, including record signing Freddie Ladapo who last week handed in a transfer request.
At present, Will Grigg and Rarmani Edmonds-Green are both poised to leave the Millers at the end of the campaign once their loan deals expire.
Warne expects both players to still be at the New York Stadium at the end of the current transfer window. Grigg is out of contract at Sunderland in the summer.
The Millers were knocked out of the FA Cup by QPR on Saturday afternoon and now turn their attention back to their League One schedule.
Rotherham sit top of the league, having gained 50 points from 24 games. Sunderland are level on points but have played a game more.
Warne's side travel to Fleetwood Town - who inflicted a damaging defeat on Doncaster Rovers last weekend - this Saturday.

. Michael Smith
OUT OF CONTRACT: Michael Smith is one of 13 Rotherham United players in the final months of his current deal. Picture: Getty Images. Photo: Getty Images

. Michael Smith
Michael Smith - The striker joined the Millers at the start of 2018. He has since made 186 appearances, scoring 53 goals. Photo: Getty Images

. Jamie Lindsay
Jamie Lindsay - The midfielder arrived at Rotherham United in the summer of 2019. He has played 85 times for the club. Photo: Getty Images

9. Joe Mattock
Joe Mattock - The left-back first joined the Millers in 2015. He has gone on to make over 200 appearances, scoring five times and providing eight assists. Photo: Getty Images

10. Chiedozie Ogbene
Chiedozie Ogbene - The winger has gone from strength to strength since joining Rotherham from Brentford in the summer of 2019. He has earned his first international cap for the Republic of Ireland during his time with the Millers. Photo: Getty Images

11. Jake Cooper
Jake Cooper - The defender spent the first half of the season on loan at National League North side Darlington FC. Photo: Getty Images

12. Joshua Chapman
Joshua Chapman - The goalkeeper joined the club last summer. He currently has the option of a further year. Photo: Getty Images