Dear Phani,

Yes you can do architecture course after completing diploma course.
The candidate who has completed diploma in civil engineering is eligible for the architecture engineering course through the lateral entry scheme offered by the Engineering colleges in India. In this scheme, you can get admission for the second year in the Engineering course on the condition that you should have either completed diploma in Engineering or B.Sc course. Since you have completed diploma in civil engineering, you are eligible for entry in Engineering college via lateral entry scheme. Most of the Engineering institutes in India offer lateral entry scheme. They reserve around 15 percent seats every year for this entry scheme. The process of giving admission is different for each university. While some may ask you to appear in Lateral Entry Engineering Test (LEET), others would be happy to give you direct admission based on your performance in the diploma course.

Eligibility:

• You need to have completed diploma in civil engineering from a recognised university.
• You should score at least 60 percent marks in diploma course to appear in LEET entrance exam or to get direct admission.
• There is however a possibility to get admission with 50 percent marks in diploma as well but there are very few colleges who grant admission with such percentage.

For more information on LEET exam and its syllabus click on the link below:

https://engineering.careers360.com/articles/what-btech-lateral-entry-eligibility

I hope this helps, All the Best!