Mild anemia, neutropenia, allergic asthma, c3 complement 0.57 with ref. 0.9 to 1.8. no other physical symptoms?

Low C3 complement: I recommend discussing the lab results with the ordering physician since he/she will be able to explain why they were ordered and based on your past medical history and current medical problems what the results indicate. I recommend reading this link: https://www.urmc.rochester.edu/encyclopedia/content.aspx?contenttypeid=167&contentid=complement_c3_blood