Short answer: Inter-subsect marriages (e.g., among Gujarati, Rajasthani, and South Jains) do occur, but they are not common and practice varies by community, region, and family.

What Jain tradition generally says

• Historically, Jains have preferred endogamy (marrying within the Jain community, often within the same sect—Digambara or Śvetāmbara—and sometimes within sub-communities). This is a social/custom practice rather than a strict doctrinal ban. The core Jain aims remain spiritual progress and ethical conduct, not caste hierarchy. You’ll see this echoed in discussions about intercaste or inter-subsect marriages being allowed in principle but not universally accepted in practice.
• In modern times, some urban and reform-minded groups, especially within Śvetāmbara communities, are more open to cross-subsect or even cross-caste marriages, but this is not universal. Digambar communities tend to be more conservative on this issue. Attitudes vary widely by family, temple, and local leaders.

Specific notes by sub-communities

• Kutchi Jain communities in Mumbai and nearby areas have been moving toward promoting inter-sub-community marriages among their sub-groups, under initiatives like “Beti Vyavahar” to reduce endogamy within the Kutchi Jain sub-communities. This shows a directional shift in practice in at least one regional group.

Important caveats

• Even when inter-subsect marriages are possible, acceptance often depends on local norms, family expectations, and how strictly a couple intends to follow Jain dharma (lakshana, rituals, dietary practices, etc.). If both partners are Jain but from different sub-communities or sects, there can be negotiations about ceremonies and family practices, separate from any doctrinal prohibition.

If you want, tell me which exact sub-communities you have in mind (e.g., specific Gujarati Jains, specific Rajasthani groups, or a South Indian Jain community) and I can share more context on how their families tend to approach these marriages in practice.

You can read more here