Astrologically speaking, a horoscope can indicate early or delayed marriage of an individual. In the horoscope of a male, the significator of marriage is Venus and the lord of seventh house. Presence of benefic planets in the seventh house show early marriage. Similarly, if the Lord of seventh house and Venus are well placed and have the aspect of benefic planets, an early marriage is possible.
On the other hand, if seventh house, Lord of seventh house and Venus are badly placed or have the aspect of malefic planets, a delayed marriage can be predicted.
In the horoscope of a female, Jupiter has a significant role for early and happy married life. If Jupiter and Lord of seventh are well placed and in the aspect of benefit planets, early and blissful married life can be forecast.
You can go through my article "Marriage related problems- Part I and II". This is knowledgeable and interesting article.