The 'American Boy' singer is said to have been lined up for a judging role by Simon Cowell after Rowland expressed a desire to concentrate on her US career.
"Estelle's name is very high on his list now and serious enquiries have been made as to her availability for auditions in May," a source told The Sun.
Rowland recently said that she would love to join The X Factor USA as a replacement for departed judges Nicole Scherzinger and Paula Abdul.
A representative for the ex-Destiny's Child star last month played down suggestions that she is leaving The X Factor, telling Digital Spy that she "enjoyed every minute of the show".
Cowell has said that he is open to reshuffling the panel of Rowland, Tulisa Contostavlos, Louis Walsh and Gary Barlow, though the latter confirmed last week that he is in talks to return as a judge.
Watch Estelle in the video for 'American Boy' below: