Which three native languages in Canada are going to survive?

From Wikipedia: Inuktitut dialect map with labels in Inuktitut inuujingajut or local roman alphabet / Carte des dialectes d'Inuktitut avec étiquettes en Inuktitut inuujingajut ou en alphabet latin standard.

CBC has the answer in an article on a new Inuktitut phrase book: it's Ojibwe, Inuktitut, and Cree:

Billed as a phrase book for nearly all occasions, Pocket Inuktitut is the second aboriginal language book put out by Winnipeg-based publishing house Mazinaate.

Author Martha Toka Peet, an Inuktitut interpreter and translator originally from the Nunavut community of Taloyoak, said the book should be useful to anyone travelling among the Inuit.

The pocket-sized book deals with everyday situations such as going to the grocery store, the church or the hospital.

It also includes small talk for conference-goers, and tips on local culture such as how to dress and behave when visiting Inuit communities.

The company previously published a book on Ojibwe phrases and is currently working on one for Cree, said publisher Pat Ningewance.

"Those are the three languages that, it has been said, will survive," she said.

The populations given by Wikipedia are:

46 298 for Ojibwe,

around 35 000 for Inuktitut,

and 117 410 for Cree.