The 17-year-old took third place in the final 2019 Red Bull Cliff Diving World Series event in Bilbao, Spain.
The Commonwealth Games athlete, the youngest ever Red Bull diver, was competing as a wildcard entry. It was his second appearance in the series.
In a strong field, he finished behind multi-champion Gary Hunt, who won with 398.95 points, and Mexico’s Jonathan Paredes, who scored 390.95 points. Heslop was not far behind with 384.60.
Fellow Plymouth diver Owen Weymouth finished 13th in the televised event.
The Spanish leg of the series saw competitors dive of Bilbao’s La Salve Bridge.
World champion Hunt certainly believes Heslop has a bright future in high diving.
After the final leg, he said: “Some stars showed their potential this year – Constantin Popovici and Aidan Helsop I look forward to many more battles.”
In the women’s competition, Plymouth-based Iris Schmidbauer secured her permanent place at next year’s Red Bull World Series with a seventh-placed finish in Bilbao.