Whether the mesh filter can stop the foam is related to the material of the screen, the pore size and the characteristics of the foam. Generally speaking, the pore size of the screen filter is the main factor affecting its ability to hold back foam. If the aperture of the mesh is small enough to hold back the tiny bubbles in the foam, then it can effectively hold the foam.
However, the size and shape of the foam is also one of the factors that affect whether it is able to pass through the screen. Some irregularly shaped foam may get stuck in the mesh of the wire mesh and thus be blocked. However, if the size of the foam is similar to the pore size of the screen, or if the shape of the foam is regular, then it is possible for the foam to pass through the screen filter. 
In addition, the material of the mesh will also affect its ability to hold back the foam. Some softer, more elastic mesh may be better at holding the foam, while some harder, brittle mesh may not be effective at holding the foam. 
In summary, whether the wire mesh filter can stop the foam depends on the combined effect of many factors. In practical application, it is necessary to select the appropriate wire mesh filter according to the specific situation to achieve a good bubble blocking effect. At the same time, it is also necessary to replace or clean the wire mesh filter regularly to ensure the stability and continuity of its bubble retention performance.