Take a look at the link below to see if you can identify the problem. I am an abject failure at IDing most problems through photos. But I'm sure it isn't insect damage.

Here is a link that might be useful: Common bean diseases

Thank you for the link and the non-bug diagnosis! It looks worse now and does seem to be some diease like you suggested, but it kind of looks like any and all bean diseases. Thanks again!

Sarah

I don't see bean rust listed at the Cornell site. I'm not sure that's what your beans have, but I do know it's very common and yours sure look like the beginning stages. [The leaf-spot color in the picture does not match the written description, which is correct, but yours do. The infection in your pictures is not "severe" yet, so there are some things you could do if that's what it is.] "...Symptoms develop on leaves and pods as pustules of red-brown powdery spores (urediniospores) which rupture the epidermis. They are often surrounded by a yellow halo. Severely infected leaves turn chlorotic, dry, and decline. ...the disease occurs sporadically and is important only under prolonged periods of warm, moist weather. ...Sulfur and myclobutanil fungicides may provide some protection."

I think that last sentence means you have to apply fungicides BEFORE they occur on the plants for prevention of the fungus, but you can begin a bean spraying program to prevent further fungal infection on the plants if it is rust. IOW, I don't think those recommended antifungals will cure it, but they can stop it. I use Ortho's Garden Disease Control for most garden plant fungal diseases, and it does cover bean rust.