Paralympic champion Kelly Gallagher's guide Charlotte Evans is to take a break from competition after suffering a serious head injury in January.
The Briton, 27, teamed up with visually impaired skier Gallagher to win gold at the 2014 Winter Games in Sochi.
However, she suffered severe concussion in a training accident in Austria and has now decided to take a break.
"Charlotte will be very hard to replace," said GB performance director Duncan Freshwater.
Evans, who intends to focus her time on coaching youngsters, added: "It has been an amazing experience and one that I will always treasure."
She was forced to miss this year's Para-alpine World Championships in Canada as result of her injury, sustained when she and Gallagher collided.
Gallagher said it had been a "weighty decision" for Evans to step back but added that she intended to carry on competing.