Salah's outstanding display helped Liverpool complete a 5-0 win over the Hornets and gave his homeland a further reason to be proud.
Egypt are now the 43rd nation to provide a hat-trick scorer in the PL and the 10th African country to achieve the feat.
England leads the way as the country to have provided the most PL players to score at least three goals in a match, with 145.
The Netherlands are second in the list with 18, while France are third with 16.
Among the African nations, two countries share the honour of having produced the most PL hat-trick scorers: Ivory Coast and Nigeria, who both have seven.
Countries with most PL hat-trick scorers
The Nigerian produced four trebles during spells at Portsmouth, Middlesbrough, Everton and Blackburn Rovers.
Yakubu is also the African to have returned the most four-goal hauls in a match, having done so on two occasions.