New Caledonia's pro-independence UPM party says it will announce on Wednesday whether it will be at next week's talks on New Caledonia's new statute in Paris.
The meetings were initiated last month when the French overseas minister Jean-Francois Carenco visited New Caledonia to restart a dialogue among the rival camps.
Last week, the pro-independence FLNKS movement pulled out of the planned negotiations, saying it won't send an official delegation to France.
However, two parties within the FLNKS have yet to say whether they will toe the line.
The UPM said its decision will be made public on Wednesday.
The anti-independence parties will attend as will the ethnic Wallisian party and kingmaker in New Caledonia's Congress, the Pacific Awakening party.
The FLNKS refuses to recognise the result of the December referendum on independence from France as the legitimate outcome of the decolonisation process.
It called for bilateral talks with Paris to draw up a path to sovereignty.