The singer thanked fans for their "incredible support" and confirmed she would not return for the next series of the BBC singing talent show.
She said: "I'm sad to say that, due to the timing of my European tour, I won't be back for season four. I absolutely loved my time on the show, and I'll miss all of the incredible people who were a part of my experience."
Moira Ross, executive producer at production company Wall To Wall, said: "Kylie has brought her own very special magic to The Voice UK and we have loved having her on the show.
"We wish her well for her tour and hope to welcome her back in the future."
Minogue joined the series this year along with Kaiser Chiefs frontman Ricky Wilson, appearing alongside Sir Tom Jones and will.i.am who have been coaches since the show began in 2012. She is credited with making a success of this year's show.
Her departure will be seen as a blow to the show which has struggled in the past against rival ITV shows.
Her debut appearance helped attract 8.4 million viewers, two million more than in the previous year, when the line-up featured singer Jessie J and The Script frontman Danny O'Donoghue, alongside Sir Tom and will.i.am.
The BBC is committed to a further two series of The Voice.