"No appropriate mapping exists" error while unshelving shelveset in TFS

You need to select your Workspace in Team Explorer, not in Source Control Explorer.

To avoid this try to create you mapping with the same path across different workspaces.

Right way :

Wrong way :

Check the workspace you have selected in Team Explorer > Pending Changes. You must have a workspace selected that has a mapping which includes the server path of the file you are trying to unshelve.

(Note: make sure you are using the workspace mapping in Team Explorer, NOT the workspace shown in Source Control Explorer.)

So if the file on shelveset is: $/TFS/Main/File1.cs, you need to have a workspace selected with a mapping that includes that file or one of its parent folders (e.g. $/TFS/Main)

I have multiple workspace for different branches and usually see this error when I try to unshelve into "Main" workspace when my "Feature Branch" workspace is selected.