Kaarel Robert Pusta (1 March 1883, Narva - 4 May 1964, Madrid) was an Estonian politician and a former Minister of Foreign Affairs of Estonia.
| Preceded by Ado Birk |
Minister of Foreign Affairs of Estonia 1920 |
Succeeded by Otto Strandmann |
| Preceded by Otto Strandmann |
Minister of Foreign Affairs of Estonia 1924–1925 |
Succeeded by Ants Piip |