Just because you have Mars, Saturn and Venus in the 4th house of your horoscope means that it will not give you happy marital life. The conjunction of 3 planets indicate a love marriage yog in your horoscope. The possibility of disturbance is there in marriage, but you need to do proper kundli milan and remedies before marriage to get a happy marital life.
Blessings,
Navneet Khanna
Astrologer