New York (CNN) A Canadian cartoonist's illustration of President Donald Trump playing golf over the bodies of two drowned migrants went viral Wednesday. Two days later, Michael de Adder said on Twitter that he had been let go by a publishing company in New Brunswick, Canada.

De Adder's illustration depicted Trump asking the two dead migrants, "Do you mind if I play through?"

The cartoon refers to the image of Oscar Alberto Martínez and his 23-month-old daughter, Angie Valeria , lying face down in water surrounded by reeds. The two drowned while attempting to cross the Rio Grande River to get into the United States.

"The highs and lows of cartooning. Today I was just let go from all newspapers in New Brunswick," De Adder tweeted. He later clarified that he had technically been under contract to work for Brunswick News Inc., and wasn't an employee who could be fired.

Brunswick News Inc. confirmed on Sunday that it canceled a freelance contract with de Adder but said "it is entirely incorrect to suggest" that it was because of the Trump cartoon.

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