India–Sri Lanka Relations: History, Importance, Challenges and Way Forward

India and Sri Lanka share a close relationship based on history, culture, geography, trade and maritime security. Their relationship is important not only for both countries but also for stability in the Indian Ocean region.

However, issues such as the fishermen dispute, Katchatheevu, Tamil reconciliation and China's growing presence sometimes create tensions.

Historical and Cultural Relations

India and Sri Lanka have shared cultural links for more than 2,500 years. Buddhism travelled from India to Sri Lanka during the 3rd century BCE through Mahinda and Sanghamitta, associated with Emperor Ashoka.

The two countries also share:

• Buddhist and Hindu traditions

• Tamil culture and language

• Religious connections

• Tourism

• Maritime trade

These links continue to strengthen people-to-people relations.

Defence and Maritime Cooperation

India and Sri Lanka cooperate closely in defence and maritime security.

Important areas include:

• Joint military training

• Maritime surveillance

• Disaster management

• Humanitarian assistance

• Defence cooperation

Two major exercises are SLINEX, between the two navies, and Mitra Shakti, between the two armies.

The Colombo Security Conclave also provides a platform for cooperation on maritime security, counter-terrorism, cybersecurity and disaster management.

Economic Relations

India became an important partner for Sri Lanka during its economic crisis in 2022. According to the source material, India provided more than $4 billion through credit lines, essential supplies, fuel, medicines and other assistance.

Bilateral trade has also grown. The source material puts total merchandise trade at around $7.18 billion in FY 2025–26.

However, the large trade imbalance in India's favour remains a concern for Sri Lanka.

Connectivity and Energy

Connectivity between the two countries is expanding through ferry services, air links, digital connectivity and energy cooperation.

The Nagapattinam–Kankesanthurai ferry service can support tourism, trade and people-to-people contact.

Energy cooperation is also growing, particularly around Trincomalee, which has strategic importance because of its natural harbour and location in the Indian Ocean.

Major Challenges

China’s Presence

China's growing presence in Sri Lanka, including investments around Hambantota Port and Colombo Port City, is a strategic concern for India.

India is also sensitive about Chinese research vessels operating in Sri Lankan waters.

At the same time, Sri Lanka wants to maintain relations with multiple countries for its economic development.

Fishermen Dispute

The fishermen issue remains one of the biggest challenges.

Indian fishermen sometimes enter Sri Lankan waters, leading to arrests and boat seizures. Bottom trawling is another major concern because of its impact on marine ecosystems and Sri Lankan fishermen.

The issue involves three important factors:

Livelihood + Maritime Security + Environment

Katchatheevu

Katchatheevu is an island in the Palk Strait recognised as belonging to Sri Lanka under the 1974 maritime boundary agreement.

The issue remains politically sensitive in Tamil Nadu, particularly because of concerns over traditional fishing rights and access to the island.

Tamil Reconciliation

India supports meaningful implementation of the 13th Amendment, which provides for political devolution through provincial councils.

India sees reconciliation and political equality as important for long-term stability in Sri Lanka.

Conclusion

India-Sri Lanka relations are based on shared history, geographical proximity and common interests.

Although challenges such as the fishermen dispute, Katchatheevu, Tamil reconciliation and China's presence remain, both countries have strong reasons to cooperate.

The future of the relationship depends on mutual trust, economic cooperation, respect for sovereignty and stronger people-to-people ties.

A peaceful and prosperous Sri Lanka is important for India's security and interests in the Indian Ocean. At the same time, India's support can contribute significantly to Sri Lanka's economic development and stability.

India and Sri Lanka must turn their geographical proximity into a stronger and more sustainable partnership.