Where in the world?
The flag of Moldova has three vertical stripes of blue, yellow, and red, with the national coat of arms centered in the yellow stripe.

Moldova (Republic of)

Moldova

Population: 2,617,820

Region: Europe

Subregion: Eastern Europe

Capital: Chișinău

Top Level Domain: .md

Currencies: Moldovan leu

Border countries

The flag of Romania has three vertical stripes of blue, yellow, and red.

Romania

Population: 19,286,123

Region: Europe

Capital: Bucharest
The flag of Ukraine has two horizontal bands of blue and yellow.

Ukraine

Population: 44,134,693

Region: Europe

Capital: Kyiv