Ate, please take your baby to the doctor or emergency room ngayon na po, diarrhea with small particles in a 3-month-old needs to be checked right away, especially kung repeated na po. Your little one can dehydrate quickly at that age, so don't wait pa. Once the doc clears her, we can talk about what might've triggered it, but para sa peace of mind mo and baby's safety, kailangan ng professional check-up muna. Sending prayers your way, keep me posted ha!