The user is using a slider and would like to have different sizes and item numbers depending on the screen.
We can implement this with two views/sliders inside two container blocks.
The first container block is configured to be hidden for mobile, and the second one is configured to be visible only on a mobile. Check this screenshot on how to make the container hidden for tablets http://prntscr.com/10m3jy3
The first container holds the slider view that you have already prepared(3cols, 3items for Desktop. 2cols 3items for tablet ). And the second container holds a new slider view that has 1 column and 1 item.
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