Rebellion has announced it will cease all motorsport-related activities after this year's Le Mans 24 Hours, signifying the end of its LMP1 project.
Rebellion, which has been present in the FIA World Endurance Championship since the series' inception in 2012, will take part in the remaining four rounds of the current 2019/20 season before bowing out following the Le Mans finale in June.
It has a sole Gibson-powered R-13, a chassis built and largely run by French company Oreca, entered in the WEC full-time, but has already announced plans to bring back its second car for the penultimate round of the season at Spa and Le Mans.
Rebellion's decision to end its motorsport activities appears to annul its planned alliance with Peugeot that had been announced in December regarding the French manufacturer's forthcoming hypercar project, due to commence in 2022.
Peugeot has already clarified its plans are not affected by Rebellion's decision.
Peugeot's motorsport director Jean-Marc Finot said: "We are currently in the early stage of building up our WEC technical project and we acknowledge Rebellion's decision that appoint us in a direction to modify the configuration of our operational system by 2022.
"Their decision to withdraw does not change Peugeot's program in endurance.
"We continue working with enthusiasm in a configuration refocused with our partner Total, to design a race car that will be a source of pride for Peugeot and that will be perfectly aligned with its energetic transition."
Of the announcement, Rebellion's president Alexandre Pesci said: "Motorsport has been a great resource for Rebellion.
"The circuits have been exceptional showcases and an important sounding board for our brand with a very wide audience.
"The returns on investment of these activities in the motorsports business have been more than satisfactory.
"We are giving ourselves time to redefine the contours of our business, but the effects of this decision will be immediate for the racing department as soon as the WEC season ends.
"These are not easy decisions to make and we are saddened that we will not be able to meet our past commitments for the years to come."
The Rebellion Racing moniker was first used in 2010 following a merger between Swiss team Speedy Racing and British squad Sebah Automotive, run by Bart Hayden.
Since then the team has participated in the LMP1 division at Le Mans every year bar one, winning the non-hybrid class in 2014 and taking an outright podium for the first time in 2018.
It emerged as Toyota's closest challenger during the 2018/19 WEC season after Porsche's withdrawal from LMP1 left the Japanese firm as the only manufacturer team in the class, inheriting victory at Silverstone when both Toyota TS050 Hybrids were disqualified.
Last November, it scored its first on-the-road victory at Shanghai, boosted by the new LMP1 success handicap systems aimed at curbing Toyota's crushing dominance.
Rebellion's first LMP1 win followed a one-year sojourn for the team in LMP2 in 2017, when it won the class title with Bruno Senna and Julien Canal.
Pesci also took part in this year's Dakar Rally with a Rebellion-branded buggy as part of a tie-up with two-time Le Mans winner Romain Dumas' RD Limited operation.