The tourist couple, aged 27 and 28, were arrested in the Malaysian capital at around 3.30 p.m., Monday, in the tourist area of Bukit Bintang, while allegedly repeating the performance while attempting to solicit donations.
Members of the public had alerted the authorities to the suspected child abuse.
A small crowd gathered to witness the event, with some recording it on cellphone cameras.
Zayl Chia Abdulla, a Facebook user who posted a video of the performance, wrote: “I (happened) to pass by this area in Bukit Bintang and I saw this irresponsible act that can literally cause injury to that poor baby.
“Why (are authorities) allowing such act to be showcase to (the) public. These street performers need to be arrested! Please do something.”