Can brown discharge for 3 days be implantation spotting?

Implantation spotting is light spotting or bleeding that occurs when the fertilized egg implants in the lining of the uterus. This usually happens around 10 to 14 days after conception. Implantation spotting is usually light and lasts only a few days. The color of implantation spotting can vary from pink to brown.

Since your discharge has lasted 3 days, it is unlikely to be implantation spotting.

However, it is important to note that spotting or bleeding during early pregnancy can also be a sign of a miscarriage. If you are concerned about your discharge, it is best to see your doctor for evaluation.