On 11 February 1929, Johann II died, passing the title of Prince of Liechtenstein to Franz. A few weeks after he took the title, 395,360 acres of land belonging to the Liechtenstein family were seized by Czechoslovakia. A delegation of farmers petitioned him to establish a republic in Liechtenstein, but ended their attempts when he stated that he would not give any of his money towards the country, forcing it to rely solely on taxation.[5]
He had no children so his first cousin once removed Prince Aloys was next in line, but Aloys removed himself from the line of succession in favor of his son, Franz Joseph, in 1923 as he was concerned about his age should he assume the role.[2]
On 31 March 1938, he made his first cousin twice removed Franz Joseph his regent following the Anschluss of Austria. After making him regent he moved to Feldberg, Czechoslovakia and on 25 July, he died while at one of his family's castles, Castle Feldberg, and Franz Joseph formally succeeded him as the Prince of Liechtenstein.[8][9]
Although Franz stated that he had given the regency to Franz Joseph due to his old age it was speculated that he did not wish to remain in control of the principality if Nazi Germany were to invade, primarily because his wife Elisabeth von Gutmann was of Jewish relation.[3][10]