The series result means Pakistan can not be displaced from the top spot irrespective of the outcome of their upcoming series against New Zealand as well as the one between India and the Windies.
Fakhar Zaman, M Hafeez, Sahibzada Farhan, Babar Azam, Shoaib Malik, Asif Ali, Hussain Tallat, Sarfraz Ahmed (c), Shadab Khan, Shaheen Shah Afridi, Usman Khan Shanwari, Hassan Ali, Imad waseem, Waqas Maqsood and Faheem Ashraf.
The 3-0 win has earned Pakistan four points, which have lifted them to 136 points, while Australia have dropped five points and are now on 118 points, just ahead of England on decimal points.
It is Pakistan's first-ever whitewash against Australia in a limited-over series and their 10th series win under Sarfraz Ahmed since he took over as captain in September 2016.
Umaima Sohail made 43 runs for the team, with the help of four boundaries and a six.
Mauricio Pochettino's Spurs frustration is understandable, says Jamie Redknapp
Spurs can leapfrog both Man City and Arsenal into third place with a win against the reigning champions. "Today, we spend a lot of energy on many things".
"We've struggled with the bat for quite a while now and it's up to us guys who get first go of it in Perth next Sunday against South Africa to start rewriting that last probably 18 months", Finch said.
In the first match, the Green Caps registered a comfortable 66-run triumph in Dubai on Wednesday, while on Friday, they registered a rather relaxed 11-run win despite Glenn Maxwell heroics. Both the times, he lost the number one ranking to Finch.
Babar Azam starred again at the top of the order with his second half century of the series as Pakistan made a superb start under the lights, the hosts racing to 93-0 in the 13th over.
Vice-captain Mitch Marsh, who was omitted for the ODI tour and will instead prepare for the Test series against India by captaining Western Australia in the Sheffield Shield, says avoiding a clean sweep would be a big boost for the group. Farhan scored 38-ball 39. But after the openers, only Mohammad Hafeez managed to score freely during his 20-ball 32 not out.