You can Isolate a Layer, primarily in assemblies, so you only see the objects you are working on. However, there is no "Unisolate" command. In order to bring everything back, you have to either Reset Status or Hide the isolated layer. This is not intuitive. I would suggest either making an Unisolate command available from the Layers icon above the Layer Tree, or have the Isolate command from the Layers drop-down icon checked, and selecting the Isolate command would make that layer no longer isolated.