Balint's mother, Vilma Kovács, had also been a psychoanalyst.

[5] However, they returned to Budapest in 1924, and lived at No.12 Mészáros Street, five floors above the Hungarian Psychoanalytical Society's Polyclinic, which opened in 1931.

[5][6] Balint wrote the book The Psychoanalysis of the Nursery,[7] which was first published in Hungarian in 1931, and later in German, Spanish, French, and English.

[5] Balint, her husband, and their son moved to Manchester in 1939, as did many other Hungarian psychoanalysts who were anxious about World War II.

[5][8][9] Balint died later that year of a ruptured aortic aneurysm.