The BBC did not reveal details of which shows he is working on for other channels. A spokesman added that it was too early to say if his contract would be renewed.
Most presenters have one-year rolling deals rather than fixed 'golden handcuffs' contracts, which have proved more costly.
BBC3' s average audience is a third of rival digital entertainment channel E4, owned by Channel 4.
Its average share of TV audiences is just 0 . 9 per cent, compared with 2.7 per cent for E4.