The 24-year-old was injured during Forest’s game against Middlesbrough at the City Ground last weekend.
The midfielder started the match, but he was substituted at half time with Ben Osborn coming on in his place.
Lansbury suffered a bruised rib and went to hospital straight away, but it now appears that he will feature against Leeds at Elland Road.
Lansbury is one of the best players in the Forest squad, and his availability will certainly boost the Reds’ chances of picking up all three points at Elland Road.
The former Arsenal prospect has scored nine goals and created 60 chances in 29 Championship appearances for the Reds so far this season, while having a pass accuracy of 76% and a shot accuracy of 39%.
Danny Fox is also available for Forest after recovering from an ankle injury he suffered in training, although it remains to be seen if the defender starts or not.
The former Celtic player has featured in 23 Championship games for the Nottingham-based outfit, creating 21 chances and winning 56% of the duels in the process.
Striker Matty Fryatt, though, will miss out as he has not recovered from his injury.