Do you have photos of the bloom and of the plant?

Name That Rose - GardenWeb

^^^ Unless there is something rather unique about it, I doubt you will receive an accurate ID. With 300 species and 10's of thousands of cultivars, many of which look very similar, the odds are against it.

In addition to photos, it would also be helpful to know the location, and whether the rose blooms once in the Spring/Summer, or if it blooms repeatedly throughout the growing season.

It has five petals. That is fairly unique.

Start with where you are. There are relatively few species roses found in one place. There are probably fewer five petalled cultivars.

With a picture we would have given an ID by now.