In late 2015 and early 2016, Donbavand wrote several stories for the Doctor Who Adventures magazine.
In March 2016, Donbavand was diagnosed with cancer, forcing him to stop writing and be hospitalised.  In July, Obverse Books published a charity collection of Doctor Who-themed short stories called A Target for Tommy to raise money for Donbavand. Many notable Doctor Who writers contributed to the collection, including Paul Magrs, Stephen Cole, Paul Cornell, and Daniel Blythe. 
After his recovery from throat cancer, Donbavand was then diagnosed with a tumour in his lung. Obverse Books released a charity collection sequel, A Second Target for Tommy, in February 2018 which included the exclusive publication of the Christopher Eccleston draft scene by Steven Moffat for The Day of the Doctor.