Context
The one day you forget your umbrella, it pours.
Como no podía ser de otra manera...
'As it couldn't have been otherwise' — resigned, slightly ironic. Perfect for bad luck.
Wry acknowledgement of coincidence — usually ironic, whether the luck was good or bad.
'Como la suerte quiso' is too poetic and formal. Natural Spanish uses shorter, more spoken constructions.
Context
The one day you forget your umbrella, it pours.
Como no podía ser de otra manera...
'As it couldn't have been otherwise' — resigned, slightly ironic. Perfect for bad luck.
Context
You bump into exactly the person you needed to see.
Qué oportuno / da la casualidad de que...
How timely — or the coincidence construction. Depends on tone: lucky vs ironic.
Context
The train is late on the one important day.
Pues claro, el día que más prisa tenía.
Of course, the day I was in most of a hurry — resigned Spanish black humour.
Context
Finding €20 in an old jacket when you're broke.
Mira tú la suerte.
Look at that luck — genuine or ironic depending on tone. Versatile.
Context
The one colleague who could help is on holiday.
Faltaría más.
Of course, naturally — used ironically when something inconvenient is depressingly predictable.