She was frequently incapable of taking care of her son; several times he was sent asylums and similar establishments.
In 1932 Dietrich met philosopher and poet Lanza del Vasto at the Parc Monceau in Paris.
Lanza helped and mentored Dietrich in writing, although he always refused to be credited as a co-author.
After becoming lightly wounded during a bombardment in 1944, Dietrich developed hemiplegia and then gangrene, and died the same year, aged 31.
He is best known today for his semi-autobiographical novel, Le Bonheur des tristes ("The Happiness of Sad People").