Barton, currently on loan at the French club from relegation-threatened QPR, tweeted that he would not be returning to Loftus Road next season.
"Some strange people think that I'll be playing in the Championship next season?? Good one! QPR might, I won't! #fact," he wrote.
"It's not up to QPR if I stay. Agreement already in place for me to stay here. Can't see QPR wanting me on the wage bill in the Champ."
Laubrune was quoted on eurosport.fr as saying: "We would not be against the idea of keeping Joey Barton at OM but he belongs to QPR.
"There is no agreement as suggested by Joey Barton."
QPR chairman Tony Fernandes posted a pointed tweet:
"For the record QPR players under contract cannot decide where they play. They are under CONTRACT," Fernandes wrote.
APRIL PREMIERSHIP FIXTURES
Saturday 13 April 2013
15:00 Arsenal v Norwich Emirates Stadium
15:00 Aston Villa v Fulham Villa Park
15:00 Everton v QPR Goodison Park
15:00 Reading v Liverpool Madejski Stadium
15:00 Southampton v West Ham St. Mary's Stadium
Sunday 14 April 2013
12:00 Newcastle v Sunderland St James' Park
14:05 Stoke v Man Utd Britannia Stadium
Tuesday 16 April 2013
19:45 Arsenal v Everton Emirates Stadium
Wednesday 17 April 2013
19:45 Man City v Wigan Etihad Stadium
19:45 West Ham v Man Utd Boleyn Ground
Saturday 20 April 2013
15:00 Fulham v Arsenal Craven Cottage
15:00 Norwich v Reading Carrow Road
15:00 QPR v Stoke Loftus Road Stadium
15:00 Sunderland v Everton Stadium of Light
15:00 Swansea v Southampton Liberty Stadium
15:00 West Brom v Newcastle The Hawthorns
15:00 West Ham v Wigan Boleyn Ground
Sunday 21 April 2013
13:30 Tottenham v Man City White Hart Lane
16:00 Liverpool v Chelsea Anfield
Monday 22 April 2013
20:00 Man Utd v Aston Villa Old Trafford
Saturday 27 April 2013
12:45 Man City v West Ham Etihad Stadium
15:00 Chelsea v Swansea Stamford Bridge
15:00 Everton v Fulham Goodison Park
15:00 Southampton v West Brom St. Mary's Stadium
15:00 Stoke v Norwich Britannia Stadium
15:00 Wigan v Tottenham The DW Stadium
17:30 Newcastle v Liverpool St James' Park
Sunday 28 April 2013
13:30 Reading v QPR Madejski Stadium
16:00 Arsenal v Man Utd Emirates Stadium
Monday 29 April 2013
20:00 Aston Villa v Sunderland Villa Park