In 2020, Alfa Romeo announced that they were going to axe the Giulietta and production ended on 22 December 2020 spanning 10 years of sales from a period of 2010 to 2020.

In a viability plan forwarded to the US Government in February 2009, Chrysler (a partner of Alfa Romeo parent company Fiat) reported that the 147 replacement would come to market as the Milano and that it could be built in the US.

At the 2016 Geneva Motor Show, a new Giulietta revision debuted with facelifted front resembling the new larger Giulia.

Also a new 1.6-litre JTDm 120 PS (88 kW; 118 hp) diesel engine with TCT transmission was introduced, as well as a new exterior colour and wheel designs.

[20] The UK version was originally marketed as the Giulietta Cloverleaf, then Quadrifoglio Verde through '14-'15 before finally being renamed to the Veloce in 2016 until the end of production.

[24] At Centro Sperimentale di Balocco in October 2014,[25] Alfa Romeo launched a 60th anniversary edition of the Giulietta.

The Squadra Corse TCT is a limited edition version of the Giulietta Quadrifoglio Verde made for the South African market.

It comes with the 1750 Turbo Petrol engine modified to produce 286 PS (210 kW; 282 hp), a custom sports exhaust and the Alfa Romeo TCT transmission.

Fitted to the 1.4 MultiAir petrol and 2.0 MultiJet diesel, this compact six-speed gearbox reduces the fuel consumption and CO2 emissions of both engines compared to the manual versions.

[29] From late 2015, all engines in the Giulietta range are Euro 6 compliant and all apart from the 2.0L MultiJet2 Diesel (2014) come with improvements to their CO2 emission and fuel economy figures.

[30] The top of the range model has 1.7 L turbocharged engine, the 1750 TBi – 235 PS (173 kW; 232 hp) with an exclusive Quadrifoglio Verde configuration (called Cloverleaf in the UK).

The Alfa Romeo Giulietta is equipped with a reactive head restraint and gained five star () rating and overall score of 87/100 in the Euro NCAP car safety tests.

Alfa Romeo Giulietta Quadrifoglio Verde is used as Superbike World Championship safety car (except in the United States rounds, where because of Fiat marketing, the Dodge Challenger SRT and some Ram Trucks are used since the Giulietta brand is not sold in the United States, but the Ram and SRT brands are.).

[51] In 2017, Davit Kajaia and Dusan Borković joined forces with Romeo Ferraris and raced the full TCR-season as GE-Force, taking three victories in Georgia, Bahrain and Salzburgring.

[52] For the 2019 season, the car received a major aerodynamic upgrade being renamed as "Alfa Romeo Giulietta Veloce".

Team Mulsanne maintained Ceccon and hired Ma Qing Hua (ex-Formula E and WTCC driver).

Alongside the World Cup cars, Romeo Ferraris will have about 8–10 Giuliettas racing in TCR Italy, UK, US, Australia and China.