If you have a consistently good academic records, financial support and proof of proficiency (usually TOEFL) In English
If you wish to apply for an Undergraduate Programs (like BS, BE, BA etc) Colleges will ask for 12 years of formal education (12th examination or junior college in India) The acceptable certificates include: Indian School Certificate, Intermediate Certificate, Higher School Certificate, Higher Secondary Certificate, and All India Senior School Certificate.
For Graduate Programs (MS, MA, MBA etc) most schools require qualifications comparable to a U.S. Bachelor's degree (Four-Year Degree Program) or a minimum of 16 years of formal education. In the Indian context, this implies qualifying in either a professional four-year course like engineering or other such courses. (If you have a 3-year degree program in India, better apply for a Post Graduate degree in India)
A one-year university affiliated program will make up for the fourth year of a U.S. Undergraduate degree.