Paralympic champion Aled Davies will not get the chance to defend his discus title at the 2016 Rio Games.
The F42 category of the event is being removed from the games though the F42 shot put, in which Davies won bronze at London 2012, stays.
Davies is now hoping to gather support to try and get the International Paralympic Committee (IPC) to reverse its decision.
"I'm very upset but also angry and frustrated at this time," Davies said.
IPC Athletics has announced
the medal events for the 2016 Paralympic Games and Davies said he was baffled to discover the event in which
he won gold last year
was not included.
"I'm just gutted to be honest because at the moment I haven't got a discus event in Rio which I've grown up doing and what I'm funded to do," he said.
"All I can do now is fight my corner and hopefully I can get a lot of people behind me to support me and make the IPC realise they are throwing away a good event.
"The only way I can do that is if the public come out and help support me and hopefully help turn over their decision.
"They've taken out events which are so strong and competitive, not just in Britain, but around the world as well.
What is the F42 category?
Includes single above-knee amputation, double above-knee amputations, and athletes with combined arm/leg amputations. It may also include athletes with severe problems when walking, such as impairments in one leg from polio.
"People are striving to push the world record up to able bodied standard."
Davies won gold in the
F42 shot put
at last week's IPC Athletics World Championships in Lyon.
The 22-year-old also set a new stadium record in winning the shot at last weekend's Anniversary Games in London.
He will be competing at the Welsh Athletics International fixture on Wednesday but Davies said the evening at Cardiff's Leckwith Stadium will be one of "mixed emotions."
"I was really looking forward to the Welsh international," Davies told BBC Wales Sport.
"It was going to be my last competition of the season and then I can think about going into winter training and coming out next year and being even better.
"At the moment I'm kind of not looking forward to competing now because it could be the last time that I compete in the discus."