The Houston Rockets have the best three-point percentage by a team in a game with 70+ three-point attempts, at 32.9 percent versus the Nets on January 16, 2019.
Interpreted as:
highest 3 point shooting percentage by a team in one regular-season game in any season with at least 70 three point attempts
Results may be incomplete. StatMuse has complete team, game-level data for three-point attempts and three-point percentage going back to the 1983-84 season.