Hide items from the library that have not sources

Hi

Is there any way to hide items from the library that have not sources?

I have some movies and tv shows on a external hdd, i search the content to library, of course this hdd is not always available and is annoying to see all stuff in a library press and item and see the message to delete from library because not find the item.

This is possible? or is a request to a new feature?

Thanks