The former US Open champion has also been fined $125,000 US dollars (€114,000) after using a decongestant which includes the banned substance R-methamphetamine (levo-methamphetamine).

In a statement on social media, McDowell wrote: “Ahead of LIV Nashville, I was struggling with severe congestion that was affecting my sleep.

“In an effort to manage it, I used a generic Vicks nasal decongestant without realizing it might be on the banned list.

“As a professional golfer, I understand the importance of checking all medications and the option to apply for a Therapeutic Use Exemption (TUE).

Unfortunately, I did not think to do this due to the over the counter nature of this medicine and I deeply regret the oversight. I fully accept the sanctions imposed by LIV.

“LIV’s Anti-Doping Policy is designed to be thorough and transparent. Unlike some other tours, LIV enforces these rules rigorously, which made this particularly challenging for me.

“However, I respect the need for these rules and penalties – they are essential for maintaining the integrity of the sport.

“I’m proud of my 22-year career and the way I’ve conducted myself through it. Now, I’m focused on moving forward and getting back on the golf course. I look forward to seeing everyone at LIV Chicago.”

McDowell’s place on Smash GC this week will be filled by a currently unnamed reserve player.