Antonelli, 18, has experienced a difficult run of Formula 1 races since his podium finish in Canada, including retiring from two Grands Prix and finishing 16th at Spa.
Hamilton visited Antonelli in the Mercedes motorhome and encouraged him to “keep his head up” and “keep believing” after Antonelli was emotional following Q1 elimination.
Hamilton, who also started his F1 career with a top team, expressed support for Antonelli, acknowledging the pressure on an 18-year-old in such a position.
Mercedes team principal Toto Wolff has stated that retaining Antonelli and George Russell is now his “priority” for the next season.