J3, J03, J 3 or J-3 may refer to:

Roads

County Route J3 (California) There are 45 routes assigned to the "J" zone of the California Route Marker Program, which designates county routes in California. The "J" zone includes county highways in Alameda, Calaveras, Contra Costa, Fresno, Kern, Inyo, Mariposa, Merc ...

Malaysia Federal Route J3 Kempas Highway or Jalan Kempas (Johor state route J3) is a major highway in Johor Bahru, Johor, Malaysia. It is the only state road in Malaysia constructed as a two-lane highway by an expressway concessionaire company, PLUS Expressway Berhad as a ...

Submarines

Junsen type submarine The was a ship class of submarines of the Imperial Japanese Navy (IJN). There were four submarine designs of the Junsen type: Type J1 submarine, J1, a modified J1, Type J2 submarine, J2 and the Type J3 submarine, J3. Class variants The Junsen typ ...

HMAS J3 HMS ''J3'' (later HMAS ''J3'') was a ''J''-class submarine operated by the Royal Navy and the Royal Australian Navy. Design and construction The J class was designed by the Royal Navy in response to reported German submarines with surface sp ...

, an Australian submarine

Aircraft

Junkers J 3 The Junkers J 3 was an all-metal single-seat experimental fighter aircraft. Design and development A major drawback of the previous J 1 and J 2 designs was the weight of their overall construction, which consisted of heavy iron sheets and pi ...

, a German

Junkers aircraft Junkers Flugzeug- und Motorenwerke AG (JFM, earlier JCO or JKO in World War I, English: Junkers Aircraft and Motor Works) more commonly Junkers , was a major German aircraft and aircraft engine manufacturer. It was founded there in Dessau, Ge ...

* J-3, a U.S. Navy airship * Piper J-3, a 1938 light aircraft

Other uses

* J3 perturbation, gravitational force caused by an imperfect symmetry north–south of an object being orbited *

J3 Operations Directorate The Joint Chiefs of Staff (JCS) is the body of the most senior uniformed leaders within the United States Department of Defense, that advises the president of the United States, the secretary of defense, the Homeland Security Council and the ...

, part of the US Joint Chiefs of Staff * GS&WR Class J3, an Irish steam locomotive *

Janko group J3 In the area of modern algebra known as group theory, the Janko group ''J3'' or the Higman-Janko-McKay group ''HJM'' is a sporadic simple group of order : 273551719 = 50232960. History and properties ''J3'' is one of the 26 Sp ...

, in mathematics * Eupheme (temporarily designated S/2003 J 3), a satellite of Jupiter *

J3 League or simply J3 is the third division of . It was established in 2013 as the third-tier professional association football league in Japan. The third-tier nationwide league is a relatively recent development in Japanese football with a first attempt ...

, Japanese football league *

Northwestern Air Northwestern Air is an airline based in Fort Smith, Northwest Territories, Canada. It operates scheduled passenger services to seven destinations in two territories / provinces, as well as undertaking ad hoc charters and long term charter contra ...

IATA The International Air Transport Association (IATA ) is a trade association of the world's airlines founded in 1945. IATA has been described as a cartel since, in addition to setting technical standards for airlines, IATA also organized tariff ...

code * J03: acute

tonsillitis Tonsillitis is inflammation of the tonsils in the upper part of the throat. It can be acute or chronic. Acute tonsillitis typically has a rapid onset. Symptoms may include sore throat, fever, enlargement of the tonsils, trouble swallowing, and en ...

ICD-10 code *

Triangular cupola In geometry, the triangular cupola is one of the Johnson solids (). It can be seen as half a cuboctahedron. Formulae The following formulae for the volume (V), the surface area (A) and the height (H) can be used if all faces are regular, ...

, Johnson Solid number 3 *

Samsung Galaxy J3 The Samsung Galaxy J3 (2015) (also known as ''Galaxy J3 V'', ''Galaxy J3 Pro'' and ''Galaxy Amp Prime'') is an Android smartphone manufactured by Samsung Electronics and was released on May 6, 2016. Specifications Hardware The Galaxy J3 (2 ...

; a smartphone by Samsung *

J3 battlecruiser The J3 class battlecruiser was a design study conducted during the Royal Navy's 1921 Fleet modernization programme. As a follow-on to the , the J3 class incorporated all the lessons learned from the First World War, specifically the battle of J ...

, a British military vessel design from 1920s {{Letter-NumberCombDisambig