There are some particular combinations of planets which cause late marriages. Following are those combinations :
1. When Debilitated Saturn is placed in 1,3,5,7,10 from Lagna or Moon.
2. When Kuja is placed in 8th house from Lagna or Moon
3. When Moon and Saturn are both placed in one of 1,2,7,11 from either Lagna or Moon
4. When Lord of the 7th house and Venus are aspected strongly by Saturn.
5. When Kuja and Sukra are combinedly placed in one of 5,7 or 9th houses from either Lagna or Moon and have the aspect of Debilitated Jupiter.
6. When 7th house from either Lagna or Moon have very low Sarva Ashtakavarga Bindus, there may be very late marraige or problems after marraige.