Amazon stranded inventory
Stranded inventory refers to any inventory in Amazon's fulfillment centers that do not have an active offer on Amazon. For sellers using Amazon FBA, Amazon provides a report highlighting the units in your inventory that are stranded.
Inventory can become stranded for several reasons, including if the listing is suppressed or was never created, meaning the inventory cannot be sold. If you have stranded inventory, Amazon will notify you by email and you can also click the "Fix stranded inventory" link in Seller central > manage inventory.
For more information on Amazon Stranded Inventory.