Common loanword used in sports, games, and casual counting contexts, often as a noun.
He scored a three-point shot in basketball.
three-turn
Figure skating term for a one-foot turn that changes direction and edge, tracing a '3' shape on the ice.
The three-turn is a basic move in figure skating.
カウントダウン：スリー、ツー、ワン、ゴー！
Countdown: three, two, one, go!
three balls, no strikes
three of a kind (poker)
bunting on two strikes
Borrowed from English 'three'.