Australian umpire John Ward is stable after sustaining a blow to the head while officiating in India's Ranji Trophy on Tuesday.
CA's Head of Cricket Operations Peter Roach thanked the umpires and said the decision to reduce head count was a mutual one.
India head into the first Test against Australia on Wednesday with little match practice after their tour match against state side Victoria was abandoned without a ball being bowled on Saturday, the last day of the warm-up match.
The former right arm medium pace bowler served a three-season apprenticeship on Cricket Australia's project panel before making the grade.
India all-rounder Hardik Pandya was reprimanded by the ICC for celebrating aggressively after taking a wicket during the first Twenty20 International against Australia in Adelaide, on Tuesday.
The International Cricket Council will issue all umpires with helmets in the upcoming World T20 tournament in India as part of a growing trend towards the increased safety of officials in the sport. The move comes on the back of two umpires being hospitalised in the past two months after being struck by deflected straight hits from batsmen. In December, Australian John Ward was hospitalised after being hit on the head during a Ranji Trophy match in India, while English umpire Richard Kettleborough received a nasty blow to the shin while officiating an ODI between Australia and India in Canberra on January 20, spending the night in hospital before being cleared to fly to Sydney for the following match.
Rohit Sharma's sizzling century went in vain as Australia survived a few anxious moments before pulling off a tense four-wicket win over India in a cricket tri-series ODI match in Melbourne.