The line of succession is as follows:
1. Prince Jaime, Count of Bardi, the brother of Duke Carlos; unmarried and without issue;
2. Prince Sixte Henri, younger brother of the late Duke Carlos Hugo and uncle of Duke Carlos and Prince Jaime; unmarried and without issue;
3. Prince Philipp, second cousin of Duke Carlos; his descendants are excluded because of his morganatic marriage;
4. Prince Alain, Philipp's younger brother; without issue;
5. Prince Michel, cousin of the late Duke Carlos Hugo and uncle of Philipp and Alain;
6. Prince Eric, first son of Michel;
7. Prince Michel, first son of Eric; unmarried and without issue;
8. Prince Henri, Eric's younger son; unmarried and without issue;
9. Prince Charles Emmanuel, Eric's younger brother;
10. Prince Amaury, Charles Emmanuel's son; unmarried and without issue;
11. Prince André, younger brother of Michel (n.5); his descendants are excluded because of his morganatic marriage;
12. Prince Remy, cousin of the late Duke Carlos Hugo; his descendants are excluded because of his morganatic marriage;
13. Prince Jean, younger brother of Remy; his descendants are excluded because of his morganatic marriage.
Grand Duke Jean of Luxembourg would be 3rd in the line of succession, but in 1986 he renounced for himself and his family to the Bourbon-Parma titles and claims, after Duke Carlos Hugo acknowledged the marriages of the then Princes Henri (now Grand Duke) and Jean jr. as morganatic.
Without the 1986 renounciation, the line of succession would be:
1. Prince Jaime, Count of Bardi, the brother of Duke Carlos; unmarried and without issue;
2. Prince Sixte Henri, younger brother of the late Duke Carlos Hugo and uncle of Duke Carlos and Prince Jaime; unmarried and without issue;
3. Grand Duke Jean of Luxembourg;
4. Grand Duke Henri of Luxembourg, GD Jean's eldest son; his descendants are excluded because of his morganatic marriage;
5. Prince Jean of Luxembourg, Jean's second son; his descendants are excluded because of his morganatic marriage;
6. Prince Guillaume of Luxembourg, Jean's youngest son; his descendants are excluded because of his morganatic marriage;
7. Prince Philipp, second cousin of Duke Carlos; his descendants are excluded because of his morganatic marriage;
8. Prince Alain, Philipp's younger brother; without issue;
9. Prince Michel, cousin of the late Duke Carlos Hugo and uncle of Philipp and Alain;
10. Prince Eric, first son of Michel;
11. Prince Michel, first son of Eric; unmarried and without issue;
12. Prince Henri, Eric's younger son; unmarried and without issue;
13. Prince Charles Emmanuel, Eric's younger brother;
14. Prince Amaury, Charles Emmanuel's son; unmarried and without issue;
15. Prince André, younger brother of Michel (n.5); his descendants are excluded because of his morganatic marriage;
16. Prince Remy, cousin of the late Duke Carlos Hugo; his descendants are excluded because of his morganatic marriage;
17. Prince Jean, younger brother of Remy; his descendants are excluded because of his morganatic marriage.