i have lost my icse admit card do i need it for future colleges admissions etc?
No, it's not required as per the rules but you may require some of the following at the time of admission,
Statement of Marks of the last public examination
Passing Certificate of the public examination
School Leaving Certificate or Transfer Certificate, countersigned by the Education inspector.
Transcript and the syllabus of the last examination passed
Eligibility Certificate for certain cases (like handicapped etc.)
Migration Certificate, all originals at the time of admission.