"Since last Friday I have been away filming MasterChef overseas. I love my job, and I love MasterChef. I love being part of it and will continue to be part of it," he wrote.
"During the last few days, I've been trying to make the best cookery programme, so being busy making the show and caring for our contestants has allowed me little time to think about anything else, but that has been hard.
"But as I hope everyone appreciates there is an investigation under way, which I fully support, so I cannot make any further comment at this stage and I hope that you all understand and respect my silence on the matter moving forward."
Wallace's lawyers have strongly denied he engages in behaviour of a sexually harassing nature.