You can uninstall the 3D Viewer App in Windows 10 via the Start Menu, Settings, or using a PowerShell command or these free app uninstallers to remove apps.

1] 3D Viewer 3D Viewer is the default 3D file viewer app that you get in Windows 10. It lets you view 3D models of different formats such as STL, FBX, GLTF, OBJ, and other files.