inspired by f1-gast's list of Dutch drivers I decided to start the thread with national minorities in F1.
I mean, I will make a list of all the countries who:
- had no more than 10 drivers to compete in F1
- had test drivers, that never advanced to full-time F1 racing
Test drivers who turned full-time racers are in the "Drivers" section.

Drivers: Eliseo Salazar (1981-1983)

Test drivers: Ho-Pin Tung (Renault), Ma Qing Hua (HRT 2012, Caterham 2013)

Drivers: Juan Pablo Montoya (Williams 2001-2004, McL 2005-2006), Ricardo Londoño-Bridge (Ensign 1981), Roberto Guerrero (Ensign 1982, Theodore 1983)

Test drivers: Tio Ellinas (Marussia 2012-)

Drivers: Tomas Enge (Prost 2001)
Test drivers: Jan Charouz (Renault 2010-), Jaroslav Janis (Prost 2001)

Drivers: Tom Belsø (Williams 1973-1974), Jac Nelleman (RAM 1976), Nicolas Kiesa (Minardi 2003), Jan Magnussen (McL 1995, Stewart 1997-1998), Kevin Magnussen (McL 2014-)
Test drivers: Tom Kristensen (Minardi 1997, Tyrrell 1998, Michelin-Williams 2000)

Test drivers: Marko Asmer (Williams-BMW 2003, BMW Sauber 2008), Kevin Korjus (Renault/Lotus 2011-)

Drivers: Zssss... HWNSNBM (Minardi 2004)
Test drivers: Csaba Kesjár (Zakspeed 1987)

Drivers: Narain Karthikeyan (Jordan 2005), Karun Chandhok (HRT 2010)

Drivers: Ralph Firman (Jordan 2003)
Test drivers: Derek Daly (Williams 1993), Adam Carroll (Honda 2006)

Test drivers: Chanoch Nissany (Minardi 2003 and 2005, Jordan 2004)

Drivers: Rikky von Opel (Ensign 1973-1974, Brabham 1974)

Drivers: Alex Yoong (Minardi 2001-2002)
Test drivers: Fairuz Fauzy (Spyker 2007, Lotus 2010-), Jazeman Jaafar (Williams 2007)

Drivers: Esteban Gutierrez (Sauber 2013), Sergio Perez (Sauber 2011-2012, McLaren 2013, Force India 2014-), Hector Rebaque (1977-1981)

Drivers: Olivier Beretta (Larrousse 1994), Louis Chiron (1950-1958), Andre Testut (1958–1959)

Test drivers: Adam Khan (official Renault demo driver in 2009)

Drivers: Robert Kubica (BMW Sauber 2006-2009, Renault 2010-)
Test drivers: Jaroslaw Wierczuk (Forti 1995), Andrzej Jaroszewicz (Wolf 1979), Seweryn Kubacki (McLaren 2004)

Drivers: Pedro Lamy (Lotus 1993-1994, Minardi 1995-1996), Pedro Chaves (Coloni 1991), Tiago Monteiro (Jordan 2005), Casimiro de Oliveira (1958), Mario de Araujo Cabral (1959-1960, 1963-1964)
Test drivers: Alvaro Parente (Renault 2008, Virgin 2010-), Antonio Felix da Costa (Red Bull)

Drivers: John Love (1962-1972), Clive Puzey (1965), Ray Reed (1964-1965), Sam Tingle (1963-1969), Gary Hocking (1962)

Drivers: Vitaly Petrov (Renault 2010-2011, Caterham 2012), Daniil Kvyat (STR 2014-)
Test drivers: Sergei Zlobin (Minardi 2002), Roman Rusinov (Midland 2006)

Test drivers: Jirko Malcharek (Minardi 2002)

Drivers: Stefan Johannson (1980-1991), Ronnie Peterson (1970-1978), Bertil Roos (Shadow 1974), Reine Wisell (1970-1974), Gunnar Nilsson (Lotus 1976-1977), Torsten Palm (1975), Joakim "Jo" Bonnier (1956-1971), Slim Borgudd (ATS 1981, Tyrrell 1982), Conny Anderson (
Test drivers: Kenny Bräck (Williams 1993, Footwork/Ligier 1996), Martin Kudzak (Jaguar 2003), Bjorn Wirdheim (BAR/Jordan 2003, Jaguar 2004)

Drivers: Prince Bira (1950-1954)

Drivers: Eitel Cantoni (1952), Oscar Gonzalez (1956), Asdrubal Fontes Bayardo (1959), Alberto Uria (1955-1956)

Drivers: Pastor Maldonado (Williams 2011-2013, Lotus 2014-), Johnny Cecotto (Theodore 1983, Toleman 1984), Ettore Chimeri (1959-1960)