2021 AFC U-20 Futsal Asian Cup

{{Infobox international football competition

| tourney_name = AFC U-20 Futsal Asian Cup

| year = 2021

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| dates = Cancelled

| num_teams = 12 (expected)

| confederations = 1

| venues = TBD

| cities = TBD

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| prevseason = 2019

| nextseason = TBD

}}

The 2021 AFC U-20 Futsal Asian Cup was meant to be the third edition of AFC U-20 Futsal Asian Cup (previously the AFC U-20 Futsal Championship before rebranding from 2021),{{cite web|url=https://www.the-afc.com/competitions/afc-beach-soccer-championship/latest/news/afc-rebrands-age-group-championships-to-afc-asian-cups|title=AFC rebrands age group championships to AFC Asian Cups|publisher=AFC|date=2 October 2020}} the biennial international futsal championship organised by the Asian Football Confederation (AFC) for the men's youth national futsal teams of Asia. The tournament was originally scheduled between 22 and 30 May 2021,{{cite web|url=https://www.the-afc.com/afc/documents/PDFFiles/afc-competitions-calendar-2021|title=AFC Competitions Calendar 2021|date=14 May 2020|archive-url=https://web.archive.org/web/20180301044958/https://www.the-afc.com/afc/documents/PDFFiles/afc-competitions-calendar-2021|archive-date=1 March 2018|url-status=live}} but had been postponed due to the COVID-19 pandemic.{{Cite web|date=2020-04-24|title=VFF - AFC postpones AFC Women's Futsal Championship 2020 and AFC U-20 Futsal Championship 2021|url=http://en.vff.org.vn/afc-postpones-afc-womens-futsal-championship-2020-and-afc-u-20-futsal-championship-2021/|access-date=2020-09-06|website=VFF|language=en-US}}

A total of 12 teams are expected to take part in the tournament. Japan are the defending champions.