According to multiple sources, including Healthline, Nutrisense Journal, and Verywell Health, a normal blood sugar level 3 hours after eating should be below 125 mg/dL for a person without diabetes. However, it is important to note that blood sugar levels can vary depending on the individual and what they ate, and that different sources may have slightly different ranges for what is considered normal. It is always best to consult with a healthcare provider to determine what blood sugar levels are appropriate for an individuals specific situation.