Szeluto was a prolific composer, producing symphonies, orchestral suites, piano, violin and cello concertos, masses, choral music and songs, and instrumental and various chamber works. Selected compositions include:
- Cyrano de Bergerac, symphonic poem, 1933
- Macbeth, symphonic poem, 1933
- Piano Concerto No. 1, 1933–37
- Piano Concerto No. 2, 1936–37
- Piano Concerto No. 3, 1940
- Violin Concerto, 1942
- Cello Concerto, 1942
- Piano Concerto No. 4, 1944
- Piano Concerto No. 5, 1948
- String Quartet, 1931
- String Quartet "Tatra Mountains"
- Trio, for violin, cello and piano, 1940
- Violin Sonatas
- Cello Sonatas