Dear Aspirant,

Congratulations on passing in the third trial in 10th . In the ITI admission they will ask for your trial certificate because they have certain rules and regulations while taking admission. You should go to your school and ask for the Third trail certificate or try contacting to the school administration . They will provide you the certificate. If they delay you giving the certificate just write an undertaking Letter to the administration office of ITI. And when the certificate comes to you then take it and submit it to the ITI administration office.

Hope this helps.

Good Luck!