2D Collision Detection in 3D Scene?

I would like to be able to detect collision between a particle system and an object in my scene. The particle system is placed farther back in my scene than my player. As such, there is a perspective difference in 3D view that makes it appear as if the objects are not colliding (see pic 1)

Yet, in my game view, the two objects are colliding. I would think a 2D collider would be able to handle this. How do I go about detecting collision in this scenario? Thanks!

Update: got it to work by moving my player back/resizing to avoid the issue entirely.