Mepham has been a big hit on Wearside this season, establishing himself and impressing since joining from the Cherries on a season-long loan.
Mepham's Bournemouth contract is due to expire in the summer, though the Premier League club are thought to have a one-year extension option.
The Wales international recently confirmed he would be open to the idea of joining [Sunderland](https://www.thenorthernecho.co.uk/sport/football/sunderland/) on a permanent basis having loved his time so far at the Stadium of Light.
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But Le Bris insists his only focus as things stand is on the eight remaining games and the play-off campaign that is almost certain to follow. And while he's a huge fan of Mepham, talks to decide the defender's future will wait until the summer.
"It's too early to define what will happen next season," said Le Bris.
"The group is in a really good place. We will see at the end of the season. Sometimes you would like to keep the same and if you keep the same next season it could be worse or it could be even better. We don't know, it's too early."
Mepham was recently quizzed on his future and said he'd be keen to stay at Sunderland if the opportunity presented itself.
"You do look at options that might be available to you in the summer," he said.
"It's also important to focus on the now. I've made it clear I love playing my football here.
"I love my connection I've made with my teammates and the staff and fans, and if it's a possibility in the summer it's definitely one I'd be open to. But a lot has to happen before that."
Mepham has started 29 of Sunderland's 38 Championship games and has been a hugely influential figure on the pitch and in the dressing room.
And as part of a very young dressing room, the 27-year-old, who has previously won promotion to the Premier League with Bournemouth, has a major role to play in the run-in.
"He is a big part of the team," said Le Bris.
"Like Browney, he is very important in the squad.
"He has more experiences and they share these experiences with their behaviours. The way they connect with different situations, I think this maturity is very useful even if it is difficult to measure."