Add-on components that enhance and customize the Visual Studio integrated development environment
You cannot directly delete a Visual Studio Code Marketplace publisher from the UI after removing the extension. Even if the extension has been unpublished or deleted, the publisher record itself usually remains associated with your account.
Try these steps:
Open the Visual Studio Marketplace publisher management page.
Verify that all extensions under that publisher are unpublished/deleted.
Remove any remaining members or linked resources.
If the publisher still cannot be deleted, contact Microsoft support because publisher deletion is generally handled by the Marketplace team.
You can also try using the Azure DevOps CLI:
tfx extension unpublish --publisher <publisher-name> --extension-id <extension-id>
If the publisher still remains after all extensions are removed, open a support request on Microsoft Q&A or Visual Studio Marketplace support.