Youth Olympic medalist Luka Plantić (men's light heavyweight) and Nikolina Čačić (women's featherweight) secured spots by winning their quarterfinal and box-off matches, respectively, at the 2020 European Qualification Tournament in Villebon-sur-Yvette, France.

[6] Croatia qualified one canoeist for the men's C-1 class by finishing in the top eleven at the 2019 ICF Canoe Slalom World Championships in La Seu d'Urgell, Spain, marking the country's recurrence to the sport after an eight-year absence.

Tin Srbić secured one of the two places available for individual-based gymnasts, neither part of the team nor qualified through the all-around, in the horizontal bar exercise at the 2019 World Championships in Stuttgart, Germany.

[8] On the women's side, Rio 2016 Olympian Ana Đerek received a spare berth from the apparatus event, as one of the twelve highest-ranked eligible gymnasts, not yet qualified, at the same tournament.

2018 world champion Ivan Kvesić qualified directly for the men's kumite +75-kg category by finishing among the top four karateka at the end of the combined WKF Olympic Rankings.

Meanwhile, Ivan Šapina scored a semifinal victory in the men's heavyweight category (+80 kg) to book the remaining spot on the Croatian taekwondo squad at the 2021 European Qualification Tournament in Sofia, Bulgaria.