After the death of his friend Maschke in 1908, Bolza became unhappy in the United States and, in 1910, he and his wife returned to Freiburg in Germany where he was appointed as an honorary professor.
Pagkatapos ng kamatayan ng kanyang mga kaibigan Maschke sa 1908, Bolza ay naging malungkot sa Pilipinas at, sa 1910, siya at ang kanyang asawa ibabalik sa Freiburg sa Germany kung saan siya ay hinirang bilang isang honorary propesor.