Diplomacy has been functioned as one of the most effective forces of international relations from past to present. According to the instruments used, diplomacy is divided into two main categories: hard and soft power. Hard power diplomacy is more of a military nature and economic function. Soft power diplomacy, whose influence has increased recently, is carried out with non-military elements such as culture, education and science. The history of Ottoman diplomacy begins with the establishment of the principality. Rulers have tried to regulate international relations by making use of the sub-branches of diplomacy according to the needs of the age. Condolence diplomacy discussed in the article is also a form of public and soft power diplomacy. Condolence diplomacy is a type of diplomacy that takes place through letters of condolence between rulers in case of the death of a ruler of a neighboring or allied state or a family member. The roots of Ottoman condolence diplomacy go back to the establishment of the principality. The relationship having been established through letters in the classical period was retained through telegrams in the modern period. The Sultan's condolence message was presented directly to the leader of the addressee country through these selected delegations. In this type of diplomacy where reciprocity is essential, the ruler of the relevant country would send thank you replies to the Ottoman sultan's condolence message. In this respect, condolence messages are not just only a means of expressing condolences but at the same time, it has also been instrumentalized especially for the continuation of good relations between countries. In this article, the context of condolence diplomacy between the Ottoman Empire, its neighbors and Western countries from the classical period to the collapse was discussed.