Archiving hides a list from the default view without deleting it. The list and all its contacts remain intact, and you can restore it at any time.
Archive a list
Go to Lists in the left navigation.
Find the list you want to archive.
Click the actions menu (three dots) on the list row.
Click Archive.
The list disappears from the active view immediately.
Find archived lists
Archived lists are hidden by default. To see them:
Go to Lists.
Click the Archived toggle at the top of the list view (it switches between Active and Archived).
All archived lists appear. Active lists are hidden while this toggle is selected.
Restore an archived list
Switch to the Archived view as described above.
Find the list you want to restore.
Click the actions menu (three dots) on the list row.
Click Un-archive.
The list returns to the active view with its original name and contents unchanged.
What archiving does and does not do
Archiving sets a removal timestamp on the list. No contacts are deleted.
The list's filters, members, and settings are all preserved.
Archiving is reversible. There is no permanent delete action available from this menu.