All the European National Federations were invited to register a team for the Qualifiers of the 3x3 U17 Europe Cup 2021.According to FIBA Internal Regulations, the following teams wew already qualified for the FIBA 3x3 U17Europe Cup:Men: Portugal (hosts), Lithuania (2019 winner), Russia, Estonia, Ukraine and Belarus (based on ranking). Women: Portugal(hosts), Spain (2019 winner), and Russia (based on ranking).All other registered teams had to go through Qualification. The 3x3 U17 Europe Cup qualifier was held in Szolnok, Hungary, on August 7-8
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