D-2-3 (Research Course Student) Korea Visa Guide | 2026

1. What D-2-3 Is

D-2-3 is a long-stay study category for designated research-course enrollment at eligible institutions.

2. Eligibility Checklist

• Applicant has valid D-2-3-eligible research-course admission.
• Institution and course records are complete and verifiable.
• Funding proof supports full planned stay period.
• Research/study plan aligns with requested duration.
• No unresolved compliance issues affect review.

3. Criteria Summary

• D-2-3 is not points-based.
• Review focuses on admission validity and continuity evidence.
• Funding and enrollment coherence are major decision factors.
• Weak research-course purpose documentation can trigger supplements.

4. Salary and Contract Rules

• D-2-3 is not salary-floor based.
• Financial review emphasizes stable tuition/living support evidence.
• Sponsor/scholarship records should be clear and consistent.
• Part-time work conditions are separate and permission-based.

5. Employer and Workplace Change Rules

• D-2-3 is institution-linked study status.
• Course/institution changes may require report or approval.
• Unauthorized work can negatively impact status continuity.
• Keep research-course participation records current for extensions.

6. Required Documents

• Application form, passport, ARC (if applicable), photo, and fee proof.
• Research-course admission/enrollment evidence.
• Funding proof for tuition and living expenses.
• Academic/research plan documents as requested.
• Additional office-requested case documents.

7. Fees and Processing

• Fees follow current issuance/change/extension schedules.
• Processing varies by office and institution verification workload.
• Supplements are common when funding/course records are weak.
• Apply early with complete continuity evidence.

8. Common Rejection Reasons

• Course/admission records do not satisfy D-2-3 criteria.
• Funding evidence is insufficient or inconsistent.
• Study/research plan is unclear or weakly supported.
• Compliance issues remain unresolved.
• Core records conflict materially across documents.

9. FAQ