Hi

Yes ,you can prepare for jee main as  students with qualification of 3 year diploma in Engineering approved  by either AICTE or a State Board of Technical Education are eligible as it is equivalent  to 10 + 2 in order to be eligible for JEE main .

for reference,

jee main eligibility criteria is provided below

Eligibility criteria says that:-

-) Qualification required :- to be eligible  for JEE mains  for BE or Btech you need 10+2/ equivalent qualification with Physics,  mathematics and anyone of Chemistry or Biology or Biotechnology or Technical Vocational Subject.

-) Passing year :- one is eligible for JEE main examination for consecutive three years starting from the year of appearing for 12th /equivalent examination i. e to be eligible  for JEE mains 2021 you should be either appearing for 12th board exam or equivalent  in 2021 or should have passed it in 2020 or 2019

-) There is no age limit to be eligible

-) there is no minimum percentage requirement to be eligible for JEE Mains, you just need to have passed your 12th

But yes,

To be eligible for NITs, IIITs, CFTIs one needs at least 75% marks in class 12th if belongs to General or OBC category or or at least 65% marks in class 12th if belongs to Sc or St category. For this year i. e 2021 this minimum percentage requirement of 75% - 65 % has been lifted off.

For detailed information about jee main eligibility criteria  go through our page, the link for which is provided below

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

If you have any other doubt then you can always reach us to clear them :) we are always available to help you out and guide you

Thankyou