Belyakova was invited to join the Russian national under-18 ice hockey team when she was 12 years old and made her IIHF Women's World U18 Championship debut at the 2010 tournament. Belyakova was named the best player and best scorer of the 2011 IIHF Women's World U18 Championship – Division I. She also participated in the 2012 IIHF Women's World U18 Championship and was named a top-3 player on the Russian team by the coaches of the tournament. In total, she played 28 games for the Russian national U18 team, scoring 30 goals and making 11 assists.