I have an interview coming up..should I tell them I was suspended from my old job then quit?

On all your future job interviews - try to be upbeat about any "failures". Go ahead and admit you were in the wrong place, and had to take the suspension, it was a learning experience. But its' good because you weren't being challenged anyway. Unfortunately, many people are hired who are not suited or qualified for their jobs - employers as a cl are lazy and do not want to check references. Employers know that 80% of people lie on their employment applications, and if they slip and/or screw up - they'll start making those phone calls to uncover "lies" and lying is an automatic termination. Employers are weasels too!