Correct spelling, explanation: surface is a popular word – not only a noun but also an adjective and a verb. Its spelling comes from the French surface and it’s patterned on Latin superficies surface, upper side, and top. As you can see, it’s an exact borrowing, so we shouldn’t change anything in the structure. It means that the form suface is incorrect.

Definition of surface:
1. noun, the outer or top part or layer of something
Most of the earth’s surface is covered by the sea.
Glass has a smooth surface.
2. adjective, relating to or found on the surface of something
The surface temperature of the lake is low.
The boating accident caused damage only on the surface.
3. verb, to become known or obvious after being hidden
His true intentions were starting to surface.
New information about the murder is slowly surfacing.

Collocations with surface:
Some most commonly used collocations include: shiny surface and wet surface.
The shell has a shiny surface.
Don’t sit on a wet surface or you’ll catch a cold.

Incorrect spelling, explanation: the word suface doesn’t exist in any dictionary. We can just wonder where it came from. It probably exists due to carelessness or fast pronunciation. If you want to spell it correctly, you must pay attention to its structure – do not omit the -r letter. The only correct version of this word is surface.