Suppose there is a perfectly reflecting mirror, which is somehow made to the size of wavelength is visible light. Will there be any reflection now, or will it act in some other way?

I thought there might be two diffraction patterns generated. One on the screen away from the source where the mirror acts an obstacle to the incoming light, and the other on the screen towards the source where mirror acts as a new source of light. But i was still confused about the reflection thing. Will we be able to see two rays with angle of incidence equal to angle of reflection?

P.S. I am a highschool student, so am not well versed with some advanced physics that might play some role here. But I know the concepts of interference and diffraction.

Any help will be appreciated!!