You say you're from India but don't say where you're at now. Since you used term CV instead of resume, maybe still in India or maybe a European country? If the job market where you're at is largely expecting a University degree regardless of experience level then I would say at 27 go back and get your University degree. It is not a step backwards to get the University degree it will teach you valuable things that you will never learn from experience alone. The theory about why things are done the way they are is an important thing to develop future skills in future problem solving.

Your other option would be to change job markets to where they don't prioritize the University degree after you've had some job experience. That being said 3 years of job experience is not a replacement for a 4 University degree. Even in the United States where it is still possible to work your way into positions without the University degree that is simply not enough experience to be considered. At dropping out of college and 3 years of experience you would still be looking at a non-software engineer entry level position. You would be doing support or systems administration and from there you could demonstrate the skills to move into a software engineering position.

Some other red flags are you say this is your first job you've had and you got it 3 years after you dropped out of University. Health, family, life situations do come up that cause you to take this kind of break in these kind of gaps but employers don't care. As people they may understand these things happen but as an employer looking for an employee they don't care. That's why I really think overall your best option return to University complete the degree and then with the degree your prior experience will matter and that Gap will go away.