The 30-year-old, who won the shot put event at the 2024 British Athletics Championships last week, was not named on the Team GB athletics squad last Friday. Campbell said she is considering retiring from athletics after the snub. 

"I'm very much considering retirement," Campbell said in an interview with Reuters. 

"I want to retire because there seems to be no point in me mentally and physically pushing myself to these limits, to be let down repeatedly. "These are my seventh championships that I will have been denied. I made Tokyo [Olympic selection criteria] as well. It's just a joke. It is a joke.”

World Athletics’ two-pronged qualifying pathway is decided first by meeting an Olympic standard and then by world ranking. Campbell’s career-best throw is 18.18 metres, which did not meet the Olympic standard of 18.80 metres, nor the standard of 18.67 set by UK Athletics. However, she is ranked 38th in the world and would have been eligible for the 32-thrower field as each country can only send three athletes.

Women's discus thrower Jade Lally, men's hammer throwers Kenneth Ikeji and Jake Norris and men's steeplechaser Phil Norman were among British athletes who similarly hit the world ranking criteria but were not named to the team because of UK Athletics' policy of declining invites where athletes have not met their standard. Norman missed UK Athletics' steeplechase standard by just 15 hundredths of a second.

"I battled every step of the way this year on and off the track and successfully qualified for my second Olympic games," Norman said in a statement on social media. "However, due to UKA policy I was not selected and my invite to the Olympic Games will be declined. I fought tooth and nail with help of legal counsel and the UKA athletes commission to appeal this decision but unfortunately my appeal was rejected due to 0.15s over 3,000m.”

Like Campbell, Norman also took home gold at the British championships, which doubled as the Olympic trials, last week and broke a championship record that had stood since 1990. While world medallists were assured of a place if they met the qualifying standard, most athletes had to achieve the standard and secure a top-two finish at the trials.

"In the eyes of UKA I am not good enough," he said. "Physically I am in the shape and form of my life. But mentally and emotionally I have nothing left to give.”

UK Athletics said that the World Athletics qualification system is not "a direct invitation to the athlete to take part," in the Olympics.

"UKA's view is that those athletes should only be selected on similar principles to those selected through the direct qualification standards, for example, those who are capable of making top eight in their event," a UKA spokesperson said in a statement.

"In selecting teams there will always be a line with some people unfortunately on the wrong side of it, and we do understand the disappointment of those who fall into this category."

Team GB's Olympic athletics squad will be headed by world champions Josh Kerr and Katarina Johnson-Thompson. 1500m runner Kerr, who was a bronze medallist in Tokyo and eyeing the gold in Paris, and heptathlete Johnson-Thompson are 2023 World Championship gold medallists.