2D Menu with 3D Elements + Masking

Hello Everyone,

does anyone know if it is possible to 'hide' 3D elements like a cube behind a mask which is connected to a canvas, when the cube is child assigned to an element which is hidden by the mask?

my current tests, have shown me that the 3d object is world space related, which means he does not give a F*** about the mask.
no I am asking myself how I could realize such things. or if it is even possible.

kind regards
Gardosen