I'm not wearing makeup so please don't look too closely.
Literal
Bare-face [topic-は] embarrassing [reason-ので] much not-look please.
すっぴん 'bare face, no makeup' — a common word in everyday Japanese. 恥ずかしい 'embarrassing.' あまり見ないで下さい 'please don't look too much' — a polite but direct request. A relatable, self-conscious statement.