Hello I'm in third trimester of pregnancy but I feel real less movement of my baby but in 2nd trimester I felt a lot movement?

Fetal movement. At 28 weeks your baby is a nice sized fish in a nice sized pond. At 35 weeks your baby is a big fish in a small pond. The number of movements and activity of the baby does not really change. It is the perception by you causing the changes. Rather than all the punches and kicks you now feel more rolling type activity due to the baby's size in the confines of your uterus.