Hi my name is Ram,
DOB: 23/06/1989, Birth Time: 10:44am Coimbatore
a) I am in the United States for my education and does my horoscope say that I could settle in the US permanently or will I return back to India after studies?
b) When will I get married?
Looking at your horoscope it is seen that Mars is the Yogakarka planet and lord of the 4th and the 9th house. 4th house in your horoscope if for family comfort while 9th house is the bhagyastana of the native. Mars being the lord of 4th and 9th is posited in the 12th house which is the house of foreign settlement. Therefore there are strong chances that you will eventually live overseas only. As Mars is debilitated in the 12th house as it is in the sign of Cancer, it indicates that settlement will not be easy and you will therefore face obstacles and hindrances. Nevertheless as Bhagesh is in the 12th house, it is strongly indicates that your bahgya or destiny is good overseas only.
Regarding your marriage , Saturn rules the 7th house which is the prime house for marriage. Saturn posited in the 5th house also aspects the 7th house, indicating late marriage. Rahu in the 7th house forms the Kalathra Dosha indicating that marriage should be done with proper matching of the horoscope. You may read more about Kalathra Dosha in the link below.