Sonia Blanchette appeared in court on Friday after undergoing a lengthy psychiatric evaluation.
Details of the psychiatric assessment were not revealed in court.
The 33-year-old Blanchette was arrested after two-year-old Anais, four-year-old Loic and five-year-old Lorelie were found dead in her Drummondville residence in early December.
Blanchette faces three counts of first-degree murder and is due to return to court on March 28.
A court decision had limited Blanchette to supervised access to the kids every second Sunday.
In interviews a few days after the children were found dead, former work colleagues described Blanchette as a doting mother who liked to show off photos of her kids on her cellphone.
One of them said she had a positive attitude at work — but often spoke about how deeply she missed seeing her children.
Drummondville is midway between Montreal and Quebec City.