As per your score and previous year cutoff, the colleges you get in third round are:-

National Institute of Technology Silchar Department of Electronics & Communication Engineering          Microelectronics & VLSI Design   

National Institute of Technology Tiruchirappalli          Department of Electronics & Communication Engineering  VLSI System

Visvesvaraya National Institute of Technology Nagpur Centre for VLSI and Nanotechnology     VLSI Design         

National Institute of Technology Agartala        Department of Electronics & Communication Engineering          VLSI Design 

National Institute of Technology Goa     Department of Electronics & Communication Engineering          VLSI  

National Institute of Technology Durgapur       Department of Electronics & Communication Engineering          Microelectronics & VLSI    

National Institute of Technology Delhi   Department of Electronics & Communication Engineering          Electronics and Communication Engineering with specialisation in VLSI    

National Institute of Technology Warangal       Department of Electronics & Communication Engineering          VLSI Systems Design       

To know more about your chances of getting other colleges check out the PSU/college predictor link below:

https://engineering.careers360.com/gate-college-predictor

Hi Prashant, the cutoff varies every year based on various factors like number of seats available number of test takers difficulty level of exams and category etc. However going by previous year cutoff, I would say the chances are very close or slim chances. Because in 2017, this cutoff was not enough to get in NIT Trichy, but last year around 436 was the last score for NIT Trichy SC category. So it all depends on how many people above your score try to occuoy the seats. Lets hope that you will get through with positive intentions. All the best