The 2021 SLC Invitational T20 League or Dialog Invitational T20 League was a Twenty20 cricket tournament that took place in Sri Lanka from 12 to 24 August 2021. All the matches were played at the Pallekele International Cricket Stadium, in Kandy, and were used as preparation for South Africa's tour of Sri Lanka and the 2021 ICC Men's T20 World Cup. Four teams took part, with the top two sides playing each other in the final.