Sukamuljo made his comeback at the All England Open in March 2021. He and Gideon had played in the first round by beating the host pair Matthew Clare and Ethan van Leeuwen in a rubber game, but later Indonesia team were forced to withdraw from the competition by BWF after the team members will self-isolate for 10 days from the date of their inbound flight after an anonym person traveling onboard tested positive for COVID-19. In July 2021, Sukamuljo competed at the 2020 Summer Olympics partnering Gideon as first seed. The duo led the group standings after won two matches and lost a match. Gideon and Sukamuljo were eliminated from the competition by Malaysian pair Aaron Chia and Soh Wooi Yik in the quarter-finals.