Late marriage in astrology is often linked to specific planetary influences and house placements in a horoscope. A weak or afflicted Venus can delay marriage by affecting love and attraction. The influence of Saturn may bring delays, restrictions, or responsibilities that postpone commitment. Issues in the seventh house or malefic aspects from other planets can also contribute to late marriage. Additionally, Manglik Dosha may create obstacles in finding a suitable partner. However, proper remedies and guidance can help reduce delays and improve marital prospects.