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Webster 1913 Edition

Noun.

The state, characteristic, or quality of being circumstantial; particularity or minuteness of detail.

“I will endeavor to describe with sufficient circumstantiality.”

De Quincey.

, n.

The appendage of circumstances; the state of any thing as modified by circumstances.

Particularity in exhibiting circumstances; minuteness; as the circumstantiality of a story or description.

circumstantiality ‎(plural circumstantialities)

Minute detail.
- 1842, Nikolai Gogol, translated by C. J. Hogarth, Dead Souls, chapter 7
  Plushkin's list was distinguished by a conciseness of exposition which had led to certain of the items being represented merely by Christian name, patronymic, and a couple of dots; and Sobakevitch's list was remarkable for its amplitude and circumstantiality, in that not a single peasant had such of his peculiar characteristics omitted as that the deceased had been "excellent at joinery," or "sober and ready to pay attention to his work."
An irrelevant detail that disturbs one's thought process.

minute detail