すまんな

sorry, my apologies

すまん sorry, my apologies + な Imperative or prohibitive marker
interjection Rare #41,207
sorry, my apologies Casual and often masculine-sounding; used to apologize.
JA: 遅れてすまんな。
EN: Sorry I'm late.

すまんな

Sorry about that.

— パディントン2 (2017)

待たせてすまんな

Sorry to keep you waiting.

— The Garden of Sinners: Paradox Spiral (2008)

心配かけてすまんな

Sorry for making you worry.

— アバウト・タイム ~愛おしい時間について~ (2013)