3️⃣ Keycap Digit Three

The Keycap Digit Three emoji is a sequence of the 3 Digit Three and ⃣ Combining Enclosing Keycap emojis. These display as a single emoji on supported platforms.

Keycap Digit Three was approved as part of Unicode 3.0 in 1999 and added to Emoji 3.0 in 2016.