Hi Mridul, 

You might not be able to qualify on the basis on the JEE rank but you can definitely apply on the basis of your board marks.  Mode 1 is through JEE marks which has 70% seats

Mode 2 is through 10+2 marks which has 30% seats

You can definitely go ahead and apply through mode 2 in case you don't qualify the cut off

For more details please check
https://admissions.thapar.edu/online-application-form.php?_ga=2.61410220.1049489634.1552475651-109155482.1542883253
Their applications are open. check it out