[citation needed] Through her marriage to Archduke Hubert Salvator of Austria, Rosemary was a member of the Tuscan line of the House of Habsburg-Lorraine.

Rosemary was born in Potsdam, then in the Kingdom of Prussia,[citation needed] the second child of Emanuel, Hereditary Prince of Salm-Salm and his wife Archduchess Maria Christina of Austria.

[citation needed] Through her mother, Rosemary was a granddaughter of Archduke Friedrich, Duke of Teschen and his wife Princess Isabella de Croÿ.

[citation needed] Rosemary married Archduke Hubert Salvator of Austria, the second son of Archduke Franz Salvator of Austria, a member of the dynasty which reigned as Grand Dukes of Tuscany until 1860, and his wife Archduchess Marie Valerie of Austria, on 25 November 1926 in a civil ceremony at Anholt and in a religious ceremony on 26 November 1926.

[citation needed] Rosemary and Hubert Salvator had thirteen children:[citation needed] Princess Rosemary died at Persenbeug Castle, Persenbeug-Gottsdorf, Austria.