I wouldn't do it, but I'm an old geezer, relatively speaking. Now, monkstraps or loafers are a totally different story. You might even get away with the sockless loafer look, sans tie. I'll need to defer to my younger brethren for advice on sneakers with a suit. Welcome to the forum. I fit that criteria. Suits and sneakers are an absolute no-no, as are loafers imo. Loafers can be fine with a sports jacket and slacks, but i'd never wear them with a suit. It looks terrible. Monks look great with either.