To start off the year, Zhamalov competed at the Golden Grand Prix Ivan Yarygin of January, where he earned a bronze medal after a loss to returning World Champion Magomedrasul Gazimagomedov and wins over '18 US Open National Champion Jason Chamberlain and two-time age-group World Champion David Baev, the latter becoming the most notable match in the tournament. In March, he became the U23 European Champion at age 20, and in May, he claimed the Ali Aliev Memorial title. On July, he competed at the Russian Nationals, where he made the finals by downing '17 Russian National champion Magomedkhabib Kadimagomedov and '18 Junior European Champion Chermen Valiev, before being defeated by rival David Baev in another epic match, to claim the silver medal. After losing the chance to represent Russia at the World Championships, Zhamalov bumped up to an Olympic weight class (from 70 kg to 74 kg) and went on to win the U23 All-Russia Open Tournament with a win over '18 U23 World Championship medalist Timur Bizhoev in the finals, on September, becoming the 2019 U23 Russian World Teamer. Aged 21, he became the U23 World Champion with five decision victories at the U23 World Championships.