Template:Worldbox World 3 is the third normal world appearing in New Super Mario Bros. 2. This world is both beach and jungle-themed, although the music is similar to that of World 4 of New Super Mario Bros. Wii, which is a beach-themed level. The world is also similar to World 3 from New Super Mario Bros.. This world is unlocked after completing World 2-Castle or World Mushroom-Castle. The first half of the map is located at the seaside while the second half is located in land, where the jungle is, although the levels can take place between any of the two locations regardless of it's position on the world map.
There is a total of 12 levels and three Toad Houses (one of each kind) in this world, making it the longest world in New Super Mario Bros. 2, tied with World 4. Of the 12 levels, eight are levels on the main path. Of these levels, five are normal levels, one is a Ghost House and the other two are the Tower (or Fortress) and Castle levels. Of the remaining four levels, two of them are normal levels (one is a secret level), one is the Cannon level and the last is the Rainbow level. The world's boss is Wendy O. Koopa, who is fought at the Castle. However, the player can avoid fighting the bosses in this world by taking the world's Cannon, leading to World Flower.
Levels
| Level | Preview | Description |
|---|---|---|
World 3- Rainbow
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The rainbow course, which features coins that rain down from above. Read more... |
| World 3-1 | File:NSMB2GoldenBlockTropicalWorld.jpg | The level is mainly made up of hills of sand. Cheep-Cheeps that jump out of the water first appear here. Read more... |
| World 3-2 | File:Top-05.jpg | This level is an underwater level in a beach area. Read more... |
| World 3-3 | File:NSMB2 CobwebJungle.jpg | A cobweb-filled jungle level that also features Scuttle Bugs. Read more... |
| World 3-A | 
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An underwater level infested with Urchins. Read more... |
World 3- Tower
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An autoscrolling, submerged tower with many Spiked Pillars. Read more... |
World 3- Warp Cannon
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The cannon of this world, which leads to World Flower. Read more... |
| World 3-4 | 
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This level is a forest-themed level with many Wigglers and vines. Read more... |
World 3- Ghost House
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This level is a Ghost House that has multiple paths and is also infested with Peepas and Boos. Read more... |
| World 3-5 | 
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This level is an underwater level filled with massive boulders that attempt to crush Mario, along with Bloopers hiding in pipes. Read more... |
| World 3-B | File:World 3-B NSMB2.PNG | This level symbolizess the first appearance of the Mini Mushroom and prominently features it, for the level must be completed with it. Read more... |
World 3- Castle
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This level is a water-themed castle cramped with dangerous Grinders that attempt to hinder Mario. |
Enemies introduced
- Urchins
- Mini Urchins
- Scuttle Bugs
- Fishbone
- Skewers
- Wigglers
- Boulders
- Bloopers
- Blooper Nannies
- Baby Bloopers
- Bullet Bills
- Bill Blasters
- Grinders
- Boss: Wendy O. Koopa