According to ThePrint, India failed to send a formal “Letter of Acceptance” to buy the last available Boeing C-17 last month.
By U.S. Air Force by Jet Fabara [Public domain], via Wikimedia Commons
New Delhi asked for an extension till November at that time and now it seems there will be another request to extend the deadline to next year.
The latest request could derail the procurement process and make the aircraft available to other interested parties.