 Following another season in Europe in Sweden and Germany with HC Vita Hästen and Heilbronner Falken respectively, Armstrong returned as a free agent for a third stint with the Utah Grizzlies, signing a one-year contract on August 4, 2015.Prior to the 2015–16 season, Armstrong was placed on waivers from the Grizzlies and was claimed by the Reading Royals on October 11, 2015.Armstrong ended his playing career in 2016, opting to pursue a career in coaching.