I am looking for the title of an 80s film were three women rob a bank

There is a 90's film with four women who rob a bank...
Set It Off (1996) - IMDb

How to Beat the High Cost of Living (1980) - Wikipedia

I think there are four women, so this likely is a miss:

Perfect Gentlemen (1978 TV movie)
starring Lauren Bacall, Ruth Gordon, Sandy Dennis, Lisa Pelikan
IMDb review excerpt:
Four women whose husbands are in prison come together~at first, for emotional support. Later, they devise a scheme to rob a bank. This takes up a large part of the film, and it is particularly inspired and funny. The actual heist involves our four likable heroines dressing in men's tuxedos (hence, in part, the title of the film). If you love 'caper' films, you'll really go for this!

Perfect Gentlemen (TV Movie 1978) - IMDb