Born in Luxembourg to former Finnish sprinter Markus Lindahl, she is coached by her Swedish mother, Frida. 21-year-old Nora is both a Swedish and Finnish citizen.
"My big dream has always been to compete in the Olympics and to represent Finland and Sweden. Now that I have competed for Sweden during my junior years, I feel it is the right time to strive for success for Finland," Nora told Finnish Athletics.
Lindahl has been preparing for the 2026 season with warm-weather training in South Africa.
Lindahl medalled for Sweden in those junior years; over 200m, she was a European U20 gold medallist in Jerusalem in 2023 and a European U23 bronze medallist in Bergen last year.
At the Paris Olympics, she posted a time of 23.33 seconds in the heats, then was eliminated after failing to improve on that in the repechage round. At 2025's World Championships in Tokyo, she got no further than the heats after running a slightly slower time of 23.35.
Teammate Julia Henriksson currently holds the Swedish women's record over 200m - 22.69 seconds set in 2024 - and she also reached the Semi-finals in both Paris and Tokyo.
Finland did got qualify an athlete for the women's 200m at either event. The Finnish women's record over 200m is 22.39, set in 1973 by Mona-Lisa Pursiainen.
Lindahl may have to wait to make the switch official - the Finnish federation said it has been in contact with the Swedish federation and has submitted an application World Athletics, but it remains unclear as to how quickly a decision will be reached.
The standard waiting period for switching national teams is three years, but Finland have applied for that to be shortened in Lindahl's case.