When does a free throw end?

A free throw ends when it is clear that the attempt will not succeed. This conclusion stems from the rule that states a free throw is an attempt to score points from the free-throw line without interference from opponents. The outcome of the free throw can only be determined through its motion; as long as the ball is airborne and the player has not stepped off the line, the free throw is still in progress.

In instances where it becomes evident that the ball will not enter the basket—such as it going out of bounds, missing the rim, or hitting the backboard without eventually going through the hoop—the attempt is considered to have concluded. Understanding this concept is crucial for players, coaches, and officials, as it also influences whether any subsequent actions, such as rebounding or fouls, can occur after the free throw is taken.

The other scenarios do not accurately define the end of a free throw. For instance, while the referee's whistle signifies various events, it does not specifically indicate the conclusion of a free throw attempt. Similarly, a player stepping off the free-throw line does not end the attempt itself unless the shooter violates the rules prior to taking the free throw.