With Seth Curry leading the league in 3PT% this year, Steph is now the only Curry family member not to lead the NBA in 3PT% for a season Seth shot 45.6% from three this season, making 83 3PM—just over the qualifying mark of 82. Source. Dell led the NBA in 3PT% in 1998–99, shooting 47.6%. Source. Steph, despite shooting over 44% five times and over 45% three times, has never officially led the league.