The 3x3 basketball tournaments at the 2025 Junior Pan American Games were held at the Olympic Training Centre, located in the Olympic Park in Luque, in the Greater Asuncion area. The events were contested between August 15 and 17, 2025.
Two tournaments were contested with twelve teams each. The winner of each event qualified for the 2027 Pan American Games in Lima, Peru.
Qualification for the games was based on the FIBA 3x3 rankings as of May 1, 2025.
<section begin=MenGroupA /><section end=MenGroupA />
<section begin=MenA1 /><section end=MenA1 />
<section begin=MenA2 /><section end=MenA2 />
<section begin=MenA3 /><section end=MenA3 />
<section begin=MenGroupB /><section end=MenGroupB />
<section begin=MenB1 /><section end=MenB1 />
<section begin=MenB2 /><section end=MenB2 />
<section begin=MenB3 /><section end=MenB3 />
<section begin=MenGroupC /><section end=MenGroupC />
<section begin=MenC1 /><section end=MenC1 />
<section begin=MenC2 /><section end=MenC2 />
<section begin=MenC3 /><section end=MenC3 />
<section begin=MenGroupD /><section end=MenGroupD />
<section begin=MenD1 /><section end=MenD1 />
<section begin=MenD2 /><section end=MenD2 />
<section begin=MenD3 /><section end=MenD3 />
<section begin=MenQ1 /><section end=MenQ1 />
<section begin=MenQ2 /><section end=MenQ2 />
<section begin=MenQ3 /><section end=MenQ3 />
<section begin=MenQ4 /><section end=MenQ4 />
<section begin=MenR5SF1 /><section end=MenR5SF1 />
<section begin=MenR5SF2 /><section end=MenR5SF2 />
<section begin=MenS1 /><section end=MenS1 />
<section begin=MenS2 /><section end=MenS2 />
<section begin=MenR7 /><section end=MenR7 />
<section begin=MenR5 /><section end=MenR5 />
<section begin=MenBM /><section end=MenBM />
<section begin=MenGM /><section end=MenGM />
<section begin=WomenGroupA /><section end=WomenGroupA />
<section begin=WomenA1 /><section end=WomenA1 />
<section begin=WomenA2 /><section end=WomenA2 />
<section begin=WomenA3 /><section end=WomenA3 />
<section begin=WomenGroupB /><section end=WomenGroupB />
<section begin=WomenB1 /><section end=WomenB1 />
<section begin=WomenB2 /><section end=WomenB2 />
<section begin=WomenB3 /><section end=WomenB3 />
<section begin=WomenGroupC /><section end=WomenGroupC />
<section begin=WomenC1 /><section end=WomenC1 />
<section begin=WomenC2 /><section end=WomenC2 />
<section begin=WomenC3 /><section end=WomenC3 />
<section begin=WomenGroupD /><section end=WomenGroupD />
<section begin=WomenD1 /><section end=WomenD1 />
<section begin=WomenD2 /><section end=WomenD2 />
<section begin=WomenD3 /><section end=WomenD3 />
<section begin=WomenQ1 /><section end=WomenQ1 />
<section begin=WomenQ2 /><section end=WomenQ2 />
<section begin=WomenQ3 /><section end=WomenQ3 />
<section begin=WomenQ4 /><section end=WomenQ4 />
<section begin=WomenR5SF1 /><section end=WomenR5SF1 />
<section begin=WomenR5SF2 /><section end=WomenR5SF2 />
<section begin=WomenS1 /><section end=WomenS1 />
<section begin=WomenS2 /><section end=WomenS2 />
<section begin=WomenR7 /><section end=WomenR7 />
<section begin=WomenR5 /><section end=WomenR5 />
<section begin=WomenBM /><section end=WomenBM />
<section begin=WomenGM /><section end=WomenGM />