Next, still in Email Studio, navigate to Subscribers > Salesforce Data Extensions.

Use the Search tool to locate the data extension you want to delete. Then, click the checkbox next to it and click Delete from the menu. Depending on your Business Unit, you may need to navigate to the correct folder for your department before searching for the data extension.

Your data extension will then be removed from your Marketing Cloud business unit.

To delete a data extension from the import menu, log in to Marketing Cloud and navigate to Email Studio > Interactions > Import.

Locate the data extension you want to delete, click the checkbox next to its name, and then select Delete from the menu.

As long as a data extension has only been deleted in Subscribers > Salesforce Data Extensions (Step 1), you can recover it from the recycle bin in Contact Builder for 30 days after it has been deleted. 

If the data extension has also been deleted from Interactions > Import (Step 2), it is not possible to recover the deleted data extension. In this case, the solution is to also delete the data extension in Subscribers > Salesforce Data Extensions (Step 1) and rebuild the data extension.