This will be Matier's second time skating for his home country on the IIHF stage, after the blueliner won gold with Canada's U-18 junior team at the 2021 IIHF U-18 World Championship.
Selected by Nashville in the fourth round (124th overall) of the 2021 NHL Draft, Matier will fill out Canada's back end alongside first-rounders Kevin Korchinski, Nolan Allan and Brandt Clarke, as well as second-, third- and fourth-rounders Olen Zellweger, Tyson Hinds and Ethan Del Mastro.
Matier, currently skating with the OHL's Ottawa 67's, has 26 points (9g-17a) in as many outings.