Ritson will now look to step up a level, squaring off against Francisco Patera for the vacant European title in Newcastle on October 13th.
In the opening round of the contest, Ritson worked behind his devastating jab and opened Amador up with a superb selection of body shots.
Round two saw the pace slow somewhat, but Ritson controlled the ring, landing at will.
In the third, Ritson landed a stinging left to the body of Amador, who took a knee but was unable to recover from the devastating blow.
“I’m injury-free, it’s nice to get some rounds in the bank,” Ritson told Sky Sports in a post-fight interview.
“Hopefully, we have another big night on October 13, I’m prepared. Patera is durable, he can box and fight, we’ll see what he brings.
“I could have done 12 rounds tonight, I’m looking forward to the next one.”