I have studied in Hindustan university chennai 3rd year am not attending my college regularly due to my health issues so attendance is low
There are less chances to join any engineering college in 3rd year due to any reasons so it is suggested to first confirm from the college in person and then decide to leave.
To get admission in any college, you will have to appear for engineering entrances afresh if you are willing to.
Rest you have to decide.
Good Luck.