Based on the information available on SASTRA University's website ,the third round of counselling for admissions likely happened in early July 2024.The specific dates aren't available publicly, but their admissions schedule for 2024 mentions counselling rounds concluding around mid-July

Since today's date is July 1, 2024, the third round counselling has likely already concluded.

https://www.careers360.com/colleges/school-of-law-sastra-university-thanjavur

I hope it helps!