The national office of the Bloc Quebecois is rallying behind its leader after seven of the party's 10 members of Parliament quit the caucus earlier in the week.
The party's administration says Martine Ouellet has its full support.
Ouellet says the MPs who resigned will be able to keep their party memberships and are welcome to discuss a return to caucus.
The seven MPs published a letter in Saturday's Journal de Montreal saying that excluding them from the party would contribute to its death.
The letter criticizes Ouellet's leadership and says her choice to focus only on independence does not serve Quebec's interests.
It says decisions about Quebec's future will be taken at the provincial level and that Ouellet's priority should be to advance the province's interests in Ottawa.