diff --git a/.changeset/collection-row-baseline.md b/.changeset/collection-row-baseline.md
new file mode 100644
index 0000000000..18c159efe0
--- /dev/null
+++ b/.changeset/collection-row-baseline.md
@@ -0,0 +1,7 @@
+---
+'@coveord/plasma-mantine': patch
+---
+
+Fix `Collection` horizontal rows shifting out of alignment when an input shows a validation error
+
+The drag handle and remove button are now also vertically centered on the inputs in the horizontal and legacy layouts.
diff --git a/packages/mantine/src/components/Collection/Collection.module.css b/packages/mantine/src/components/Collection/Collection.module.css
index b5776d5e46..459f6435a8 100644
--- a/packages/mantine/src/components/Collection/Collection.module.css
+++ b/packages/mantine/src/components/Collection/Collection.module.css
@@ -10,6 +10,8 @@
 }
 
 .item {
+    --collection-control-offset: 3px;
+
     align-items: baseline;
     flex-wrap: nowrap;
 
@@ -19,6 +21,13 @@
     }
 }
 
+/* Baseline-aligned rows put the icon's bottom edge on the text baseline; the offset centers it on the input instead */
+.dragHandle,
+.removeButton {
+    position: relative;
+    top: var(--collection-control-offset, 0);
+}
+
 .dragHandle {
     cursor: grab;
     display: flex;
diff --git a/packages/mantine/src/components/Collection/layouts/horizontal-layout/HorizontalLayout.module.css b/packages/mantine/src/components/Collection/layouts/horizontal-layout/HorizontalLayout.module.css
index 06f497ebc1..ea58708bd6 100644
--- a/packages/mantine/src/components/Collection/layouts/horizontal-layout/HorizontalLayout.module.css
+++ b/packages/mantine/src/components/Collection/layouts/horizontal-layout/HorizontalLayout.module.css
@@ -22,9 +22,11 @@
 }
 
 .row {
+    --collection-control-offset: 3px;
+
     display: flex;
     gap: var(--mantine-spacing-sm);
-    align-items: center;
+    align-items: baseline;
 }
 
 .row[data-isdragging='true'] {
diff --git a/packages/mantine/src/components/Collection/layouts/vertical-layout/VerticalLayout.module.css b/packages/mantine/src/components/Collection/layouts/vertical-layout/VerticalLayout.module.css
index d73ce96a42..711d14365d 100644
--- a/packages/mantine/src/components/Collection/layouts/vertical-layout/VerticalLayout.module.css
+++ b/packages/mantine/src/components/Collection/layouts/vertical-layout/VerticalLayout.module.css
@@ -1,4 +1,6 @@
 .item {
+    --collection-control-offset: 0;
+
     border: 1px solid var(--mantine-color-gray-3);
     border-radius: var(--mantine-radius-default);
     padding: var(--mantine-spacing-md);
diff --git a/packages/storybook/src/components/forms-and-inputs/array/Collection.stories.tsx b/packages/storybook/src/components/forms-and-inputs/array/Collection.stories.tsx
index c33e302734..debf29ebf5 100644
--- a/packages/storybook/src/components/forms-and-inputs/array/Collection.stories.tsx
+++ b/packages/storybook/src/components/forms-and-inputs/array/Collection.stories.tsx
@@ -89,6 +89,12 @@ export const Demo: StoryObj<DemoStoryProps> = {
                     {name: 'Bob Johnson', email: 'bob@example.com'},
                 ],
             },
+            validate: {
+                contacts: {
+                    email: (value) => (/^\S+@\S+\.\S+$/.test(value) ? null : 'Invalid email'),
+                },
+            },
+            validateInputOnBlur: true,
             enhanceGetInputProps: (payload) => ({
                 ...enhanceWithCollectionProps(payload, 'contacts'),
                 readOnly: props.readOnly,
@@ -141,6 +147,47 @@ export const Demo: StoryObj<DemoStoryProps> = {
     },
 };
 
+export const CollectionValidationErrors: Story = {
+    tags: ['!dev'],
+    render: () => {
+        const form = useForm({
+            initialValues: {
+                contacts: [
+                    {name: 'Alice Smith', email: 'alice@'},
+                    {name: '', email: 'bob@example.com'},
+                ],
+            },
+            initialErrors: {
+                'contacts.0.email': 'Invalid email',
+                'contacts.1.name': 'Name is required',
+            },
+            enhanceGetInputProps: (payload) => enhanceWithCollectionProps(payload, 'contacts'),
+        });
+
+        return (
+            <Collection<ContactItem>
+                {...form.getInputProps('contacts')}
+                w={600}
+                label="Rows stay aligned when a cell shows an error"
+                draggable
+                newItem={{name: '', email: ''}}
+                layout={Collection.Layouts.Horizontal}
+                columns={[
+                    {
+                        header: 'Name',
+                        cell: (item, index) => <TextInput {...form.getInputProps(`contacts.${index}.name`)} />,
+                        maxSize: 150,
+                    },
+                    {
+                        header: 'Email',
+                        cell: (item, index) => <TextInput {...form.getInputProps(`contacts.${index}.email`)} />,
+                    },
+                ]}
+            />
+        );
+    },
+};
+
 /**
  * Legacy children render prop pattern.
  *