The Kobe, Japan-born Decarli completed their drama training from 1926 to 1928 in Dusseldorf at Louise Dumont. A first stage work, she received at the Düsseldorf Schauspielhaus (1928-1929). It followed Theatre stations in Guben (1929-1930), lunch (1931-1935), at the National Theatre in Mannheim (1935-1938) and at the English Theatre Berlin (1939). Alice Decarli often initially played the type of young lady and the salon Sentimentalen as "Louise" in Schiller's Kabale und Liebe, George Bernard Shaw's Maid of Orleans, the "Beatrice" in Shakespeare's Much Ado About Nothing and the "Alkmene" Heinrich von Kleist Amphitryon.