When will Maruti launch the diesel version of Maruti Suzuki Alto 800?

The diesel version of the Alto 800 has not been discussed anywhere by the comapny as they have developed a 800 cc diesel motor, which they plan to implant in their new Celerio. the Celerio diesel is one of the most awaited cars of 2015, with no exact details available about it. Whats sure is that it comes with the same dimensions and a five speed manual gearbox.