Wednesday’s first match, also in Dambulla, was abandoned after just 15 overs due to a tropical storm.
The storms have plagued the tourist’s time in Sri Lanka, with both warm up games being effected by the weather.
Buttler is likely to bat at number six behind captain Eoin Morgan and all-rounder Ben Stokes, but Morgan does have the option to propel him up the order if needs be.
Captain Eoin Morgan described the weather as ‘frustrating’ telling Sky Sports: “I think it is going to be that type of series.
“There was no rain forecast today, which is devastating really.
“We were keen to get into the series and get going and play but hopefully we’ll have a bit of luck along the way with the weather.
“Hopefully we’ll get a full game on Saturday but if not come back on Sunday and play.”
With there being little play in Wednesday’s game, the world number one side are unlikely to change their team.
Warwickshire fast bowler Olly Stone was handed his first cap on Wednesday but was not able to step foot on the pitch on his debut game, but captain Morgan could not confirm whether the pace man would get a chance on Saturday.
“It depends; they have another wicket prepared here,” Morgan added in an interview with Sky. “If we play on the same wicket we might have to look at our team and likewise if we play on a fresh wicket we might look to play three out-and-out seamers.
“It’s unfortunate for Olly. I actually started my one-day international career in the same mode, made my debut, game got called off and then I played in the next match.
“He’s itching to get out there, he’s very excited about putting the shirt on but that will be delayed for another day.”