diff -Nru calamares-3.2.24.orig/src/modules/partition/core/PartitionLayout.cpp calamares-3.2.24/src/modules/partition/core/PartitionLayout.cpp
--- calamares-3.2.24.orig/src/modules/partition/core/PartitionLayout.cpp	2020-05-23 12:11:51.000000000 +0200
+++ calamares-3.2.24/src/modules/partition/core/PartitionLayout.cpp	2020-05-23 12:26:41.560000000 +0200
@@ -195,6 +195,12 @@
             minSize = 0;
         }
 
+        if ( availableSize < 5 * 1024 * 1024) {
+            cWarning() << "Partition" << part.partMountPoint << "available size"
+                << "is insufficient to add partition, skipping...";
+            continue;
+        }
+
         if ( part.partMaxSize.isValid() )
         {
             maxSize = part.partMaxSize.toSectors( totalSize, dev->logicalSize() );