Chinna Kannamma
Karthik and Gouthami get marries despite their parents' refusal. They beget a girl (Baby Shamili). Gouthami dies when the baby is about 2 years. Karthik befriends with a couple. One day, the couple's daughter (Baby Pooja) dies. A nurse reveals to Suhasini that actually Karthik's child was swapped with their child. The matter goes to court. What happens to the child is the movie climax.
Starring Karthik Muthuraman, Gautami Tadimalla, Nassar, Suhasini Maniratnam, Charle, V. K. Ramasamy, Kamala Kamesh, Vadivukarasi
Watch "Chinna Kannamma" on Amazon released in 1993. It's a drama movie, and has a rating of 7 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.