LaCombe represented the
United States at the
2021 World Junior Championships, where he recorded one assist in six games and won a gold medal. LaCombe made his senior national team debut for the
United States at the
2025 World Championship, where he recorded two goals and three assists in 10 games and helped the United States win their first gold medal since
1933. On January 21, 2026, he was named to the United States' roster for the
2026 Winter Olympics, replacing the injured
Seth Jones. Although he dressed for the games, he was in the final roster and joined the team in the podium to get his gold medal, LaCombe did not play through the competition. Amid
online backlash faced by the men's Olympic hockey team regarding the inclusion of FBI director
Kash Patel during their gold medal celebrations and members of the team laughing at President Trump's comments of being
impeached if he did not invite the women's team to the
White House, the team was invited to meet with the president and attend the
State of the Union. LaCombe did not attend either the State of the Union or tour the White House. ==Career statistics==