Leadbitter tweaked a hamstring as he scored the penalty which gave his side a 2-1 lead in last Saturday’s 3-3 draw with his former club Sunderland, and Pulis has revealed he has ‘an outside chance’ of being fit.
Winger Adama Traore will definitely be available following a successful appeal against the red card – his second of the season – he received at the Stadium of Light which would have resulted in a four-game ban.
However, striker Rudy Gestede is out for the rest of the season after undergoing surgery an a fractured ankle, while full-back Fabio da Silva is still out with a thigh problem.
Leeds manager Paul Heckingbottom could have a trio of players available once again for the trip to the Riverside Stadium.
Boro old-boy Adam Forshaw missed last Saturday’s 1-0 home win over Brentford after his wife went into labour and is expected to return.
Midfielder Pablo Hernandez also missed out as he continued his recovery from a groin injury, and he too could make the squad.
Striker Kemar Roofe will hope to resume after sitting out against the Bees because of a knock.
Burton midfielder Martin Samuelsen will use the international break to recover from illness after pulling out of Norway U21's games.
Jonas Lossl is staying 'optimistic' over Huddersfield's chances of survival this season and has urged his team-mates to 'go for it'.