If a ball is lost or out of bounds, the player must take stroke-and-distance relief by adding one penalty stroke and playing the original ball or another ball from where the previous stroke was made (see Rule 14.6).

Exception – Player May Substitute Another Ball under Other Rule When It Is Known or Virtually Certain What Happened to Ball: Instead of taking stroke-and-distance relief, the player may substitute another ball as allowed under a Rule that applies when their ball has not been found and it is known or virtually certain that the ball:

• Came to rest on the course and was moved by an outside influence (see Rule 9.6) or played as a wrong ball by another player (see Rule 6.3c(2)),
• Came to rest on the course in or on a movable obstruction (see Rule 15.2b) or an abnormal course condition (see Rule 16.1e),
• Is in a penalty area (see Rule 17.1c), or
• Was deliberately deflected or stopped by any person (see Rule 11.2c).

Penalty for Playing Ball from a Wrong Place in Breach of Rule 18.2: General Penalty under Rule 14.7a.

Rule 18.2b