Arduino: 1.8.5 (Windows 10), Board: "Arduino Due (Programming Port)"
Sketch uses 23536 bytes (4%) of program storage space. Maximum is 524288 bytes.
No device found on COM3
An error occurred while uploading the sketch
This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.
Please post the complete compiler error that you get. That'll help people understand your problem better and help you out.
Has this board worked before?
Have you read any of the other similar posts about?
What operating system?
Where did you board come from? Post a link or a picture of the board.
Is there anything other than the computer connected to it?
Gautam.
This belongs in the "Installation and Troubleshooting" sub: Installation & Troubleshooting - Arduino Forum
Before posting there, the stick says to read The "Why I can't upload my programs to the Arduino board?" guide.