Hello Aspirant,
SCRIET Meerut doesn't provide diploma courses. But there are many government colleges which provides diploma in civil engineering.
1. Maharaja Sayajirao University of Baroda
2. Jamia Millia Islamia, New Delhi
3. Government Polytechnic, Nashik
4. Aligarh Muslim University, Aligarh
5. Sant Longowal Institute of engineering and technology, Punjab.

Hope this will help you.

Thank you!