Susan--I have no idea what your Sat% would be with a Ferritin of 3, although, iron deficienct women are usually under the range with a low T-Sat%..... I can however, tell you what mine was if that will help you to understand. I started with a 2ferritin, by time I got to a 3 ferritin and on iron supplements at the time of serum iron testing, my Sat% was a grand total of 6%! Who know how low it was before I started iron supplements. Keep us posted!