Perhaps some type of Grape/Cherry Tomato. The Grape I have is the opposite as yours as far as size though, its almost invasive.

How small?

Could it be a micro tomato? I've seen one grown in a pot and it's very small, perfect for growing (in a pot) on a windowsill or as a table ornament!

Linda

It is impossible to name a plant just from looking at it. Size of the plant, type of leaf, and color/size of fruit can narrow it down to 1 out of 50-100+ varieties if you are lucky. There are just far too many plants that appear identical otherwise.

It appears from the photo to be one of the rugose dwarf varieties but that is as close as you will get to determining which one it is. Color of fruit will narrow the list a little but the link below is to over 250 dwarf rugose varieties.

Dave

Here is a link that might be useful: Tatiana's Tomatobase - Dwarf Rugose varieties

Could it be perhaps a baxters cherry bush??

Baxter's is a regular leaf not a rugose leaf plant. But even if this was a regular leaf plant there still wouldn't be anyway to put a name to it.

We get lots of requests here every year to ID tomato plants and the answer is always the same - it isn't possible to do. You can pull up all the 'id the tomato plant' posts here to confirm what I am saying,

People simply do not understand that there are thousands and thousands of tomato varieties out there and hundreds of each type, size, shape, and fruit color that look exactly like each other.

Even DNA testing of the plant could not confirm the variety name since so many have the same parental line contributors. So don't worry about it.

Dave

At the very first look at the picture, I thought it looks lik my SWEET_N_NEAT dwarfs. They are less than a foot tall, and span on the ground about one foot. A long shot of the plant can be helpful to better narrow down its variety.

here is a picture of mine