The six-time All-Star passed Jason Kidd for 10th on the NBA's all-time leaderboard for 3-pointers made with his first triple of Wednesday's contest.
Lillard accomplished the feat in his 668th regular-season appearance - fewer than half the games Kidd required.
Lillard is a career 37.3% shooter from downtown and has finished in the NBA's top 10 in 3-point field goals made on eight occasions. The Blazers star's 214 triples this season rank third in the Association.
Lillard, 30, finished Wednesday's contest with a team-high 22 points but shot only 2-of-10 from deep.