Unrelated actions

single-word-requests parts-of-speech metaphors

I believe the word you’re looking for is non sequitur.

From Vocabulary.com:

A non sequitur is a conclusion or reply that doesn't follow logically from the previous statement.

Related

The right verb about satisfying or not someone's right in this context?
What is the word to describe an action taken for ones self?
Word request: A word meaning "self-describing" or "true to its name"
What are the origin and history of the forms and meanings of the phrase "top flight"?
What do you call the person in a group who everyone agrees with? Opposite of iconoclast, maybe?
Idiom for opposite of "chain is only as strong as its weakest link"?
Two "who"s in a sentence
Meaning of "Do not expect troubles as they have a tendency not to disappoint"
What do you call the anniversary of moving somewhere?
No extreme is good
Lightness of touch
Is there a word for the opposite of a gift