Rules glossary
↑ Parent rule: 506.4 A permanent is removed from combat if it leaves the battlefi…
506.4c If a creature is attacking a planeswalker or battle, removing that planeswalker or battle from combat doesn’t remove that creature from combat. It continues to be an attacking creature, although it is not attacking any player, planeswalker, or battle. It may be blocked. If it is unblocked, it will deal no combat damage.
No sub-rules.