Impossible to say anything. You have not even offered up any system and version info much less an exact description of your procedures. We simply can't know what you don't know.
Your description is very vague - there is nothing called "3D builder" in Photoshop.
I can think of two possibilities:
1. You may have opened the 3D workspace.
To get that go to the top right of your screen - click the down arrow and click on 3D
2. This has nothing to do with Photoshop and you actually have opened Microsoft's 3D builder