Diploma

Yes, you can do that.

Hi Darlin,
You can apply abroad, but there is no lateral entry. You have to apply for Bachelor's degree. If you want admission through lateral entry, then you must write to the colleges. They will evaluate your profile, subjects, credit points, etc. and will decide.

Hi Harsh,
Germany universities do not accept Indian diplomas. You can enrol into a Bachelor degree program and complete your first year with very good academic grades before applying for a Bachelor degree in Germany. Or apply for Bachelor degree programs in other countries like Australia, Canada or NZ.
I hope this helps you.
Good luck and feel free to write back.

Hi Himanshu,
Saskatchewan University offers a PG Diploma in mechanical engineering, you may pursue this course, it is also relevant to your education. You can check for more programs on the university website and also check the admission requirements.

You will have to search for individual colleges where you wish to get into. Fill their application form and sit for entrance exams. As there is no common platform for mass communication, check the cut-off after the result of entrance exam and then apply for the same.

Most engineering colleges will accept diploma students. However, the credit that they may give you for a diploma course may vary. Some colleges may consider your courses and give you admission straight into second year whereas some may not. The duration of engineering in the US and Canada is 4 years.