 In 25 postseason games, he scored six points.On 1 September 2019, the Blues re-signed Barbashev to a two-year, $2.95 million contract extension.Competing internationally with the Russian national junior team, Barbashev won gold at the 2012 World U-17 Hockey Challenge, played at the 2012 Ivan Hlinka Memorial Tournament, placed fourth at the 2013 IIHF World U18 Championships, and won bronze at the 2014 World Junior Ice Hockey Championships.