https://youtu.be/YazKRNFnOEg

• A defensive player may not remain in the free throw lane for more than three seconds unless:
  • Actively guarding an opponent (within arm’s length)
• The count is suspended when:
  • A shot attempt occurs
  • Team control is lost
  • The defender exits the lane
• Penalty: Technical foul and one free throw attempt; Offensive team retains possession.
• Defensive three-seconds is ignored if a successful field goal is scored during the violation.