The 2018–19 CSA 3-Day Provincial Cup was a first-class cricket competition that took place in South Africa from 4 October 2018 to 14 April 2019.

However, in October 2018 they withdrew from South Africa's provincial competitions, citing issues around costs and logistics.

[4][5] Unlike its counterpart, the CSA Franchise 4-Day Cup, the matches were three days in length instead of four.

The tournament was played in parallel with the 2018–19 CSA Provincial One-Day Challenge, a List A competition which featured the same teams.

[6] Eastern Province and Northerns contested the final, which finished as a draw, therefore the title was shared.